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Finding the Fourth Proportional to 643,951.30, 966,056.55 and 539,493.70

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Solution

The fourth proportional to 643,951.30, 966,056.55 and 539,493.70 is: 809,349.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,951.30 : 966,056.55 = 539,493.70 : x
  2. Step 2: Convert to fraction form
    643,951.30/966,056.55 = 539,493.70/x
  3. Step 3: Cross multiply
    643,951.30x = 966,056.55 × 539,493.70
  4. Step 4: Simplify right side
    643,951.30x = 521,181,422,568.74
  5. Step 5: Solve for x
    x = 521,181,422,568.74/643,951.30
  6. Step 6: Final answer
    x = 809,349.13

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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.