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Finding the Fourth Proportional to 398,959.20, 598,438.80 and 249,368.40

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Solution

The fourth proportional to 398,959.20, 598,438.80 and 249,368.40 is: 374,052.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,959.20 : 598,438.80 = 249,368.40 : x
  2. Step 2: Convert to fraction form
    398,959.20/598,438.80 = 249,368.40/x
  3. Step 3: Cross multiply
    398,959.20x = 598,438.80 × 249,368.40
  4. Step 4: Simplify right side
    398,959.20x = 149,231,726,053.92
  5. Step 5: Solve for x
    x = 149,231,726,053.92/398,959.20
  6. Step 6: Final answer
    x = 374,052.60

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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.