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Finding the Fourth Proportional to 519,353.60, 778,972.80 and 145,414.40

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Solution

The fourth proportional to 519,353.60, 778,972.80 and 145,414.40 is: 218,105.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,353.60 : 778,972.80 = 145,414.40 : x
  2. Step 2: Convert to fraction form
    519,353.60/778,972.80 = 145,414.40/x
  3. Step 3: Cross multiply
    519,353.60x = 778,972.80 × 145,414.40
  4. Step 4: Simplify right side
    519,353.60x = 113,273,862,328.32
  5. Step 5: Solve for x
    x = 113,273,862,328.32/519,353.60
  6. Step 6: Final answer
    x = 218,105.47

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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.