Home / 805,243.60-1,207,865.40-431,995.60

Finding the Fourth Proportional to 805,243.60, 1,207,865.40 and 431,995.60

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Solution

The fourth proportional to 805,243.60, 1,207,865.40 and 431,995.60 is: 647,993.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,243.60 : 1,207,865.40 = 431,995.60 : x
  2. Step 2: Convert to fraction form
    805,243.60/1,207,865.40 = 431,995.60/x
  3. Step 3: Cross multiply
    805,243.60x = 1,207,865.40 × 431,995.60
  4. Step 4: Simplify right side
    805,243.60x = 521,792,538,192.24
  5. Step 5: Solve for x
    x = 521,792,538,192.24/805,243.60
  6. Step 6: Final answer
    x = 647,993.40

Related Problems

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Half scale
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Double scale
Find fourth proportional to 805,244.60, 1,207,866.90 and 431,996.60
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.