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Finding the Fourth Proportional to 485,727.40, 728,591.10 and 344,009.80

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Solution

The fourth proportional to 485,727.40, 728,591.10 and 344,009.80 is: 516,014.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,727.40 : 728,591.10 = 344,009.80 : x
  2. Step 2: Convert to fraction form
    485,727.40/728,591.10 = 344,009.80/x
  3. Step 3: Cross multiply
    485,727.40x = 728,591.10 × 344,009.80
  4. Step 4: Simplify right side
    485,727.40x = 250,642,478,592.78
  5. Step 5: Solve for x
    x = 250,642,478,592.78/485,727.40
  6. Step 6: Final answer
    x = 516,014.70

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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.