Home / 839,851.80-1,259,777.70-307,390.20

Finding the Fourth Proportional to 839,851.80, 1,259,777.70 and 307,390.20

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Solution

The fourth proportional to 839,851.80, 1,259,777.70 and 307,390.20 is: 461,085.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,851.80 : 1,259,777.70 = 307,390.20 : x
  2. Step 2: Convert to fraction form
    839,851.80/1,259,777.70 = 307,390.20/x
  3. Step 3: Cross multiply
    839,851.80x = 1,259,777.70 × 307,390.20
  4. Step 4: Simplify right side
    839,851.80x = 387,243,319,158.54
  5. Step 5: Solve for x
    x = 387,243,319,158.54/839,851.80
  6. Step 6: Final answer
    x = 461,085.30

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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.