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Finding the Fourth Proportional to 539,807.20, 808,414.80 and 289,938.40

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Solution

The fourth proportional to 539,807.20, 808,414.80 and 289,938.40 is: 434,211.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,807.20 : 808,414.80 = 289,938.40 : x
  2. Step 2: Convert to fraction form
    539,807.20/808,414.80 = 289,938.40/x
  3. Step 3: Cross multiply
    539,807.20x = 808,414.80 × 289,938.40
  4. Step 4: Simplify right side
    539,807.20x = 234,390,493,648.32
  5. Step 5: Solve for x
    x = 234,390,493,648.32/539,807.20
  6. Step 6: Final answer
    x = 434,211.50

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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.