Home / 678,534.80-1,017,802.20-442,338.80

Finding the Fourth Proportional to 678,534.80, 1,017,802.20 and 442,338.80

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Solution

The fourth proportional to 678,534.80, 1,017,802.20 and 442,338.80 is: 663,508.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,534.80 : 1,017,802.20 = 442,338.80 : x
  2. Step 2: Convert to fraction form
    678,534.80/1,017,802.20 = 442,338.80/x
  3. Step 3: Cross multiply
    678,534.80x = 1,017,802.20 × 442,338.80
  4. Step 4: Simplify right side
    678,534.80x = 450,213,403,785.36
  5. Step 5: Solve for x
    x = 450,213,403,785.36/678,534.80
  6. Step 6: Final answer
    x = 663,508.20

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Double scale
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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.