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Finding the Fourth Proportional to 485,998.40, 728,414.40 and 249,219.20

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Solution

The fourth proportional to 485,998.40, 728,414.40 and 249,219.20 is: 373,529.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,998.40 : 728,414.40 = 249,219.20 : x
  2. Step 2: Convert to fraction form
    485,998.40/728,414.40 = 249,219.20/x
  3. Step 3: Cross multiply
    485,998.40x = 728,414.40 × 249,219.20
  4. Step 4: Simplify right side
    485,998.40x = 181,534,854,036.48
  5. Step 5: Solve for x
    x = 181,534,854,036.48/485,998.40
  6. Step 6: Final answer
    x = 373,529.74

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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.