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Finding the Fourth Proportional to 519,909.60, 779,864.40 and 145,932.60

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Solution

The fourth proportional to 519,909.60, 779,864.40 and 145,932.60 is: 218,898.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,909.60 : 779,864.40 = 145,932.60 : x
  2. Step 2: Convert to fraction form
    519,909.60/779,864.40 = 145,932.60/x
  3. Step 3: Cross multiply
    519,909.60x = 779,864.40 × 145,932.60
  4. Step 4: Simplify right side
    519,909.60x = 113,807,639,539.44
  5. Step 5: Solve for x
    x = 113,807,639,539.44/519,909.60
  6. Step 6: Final answer
    x = 218,898.90

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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.