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Finding the Fourth Proportional to 643,951.20, 966,099.60 and 574,312.80

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Solution

The fourth proportional to 643,951.20, 966,099.60 and 574,312.80 is: 861,623.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,951.20 : 966,099.60 = 574,312.80 : x
  2. Step 2: Convert to fraction form
    643,951.20/966,099.60 = 574,312.80/x
  3. Step 3: Cross multiply
    643,951.20x = 966,099.60 × 574,312.80
  4. Step 4: Simplify right side
    643,951.20x = 554,843,366,354.88
  5. Step 5: Solve for x
    x = 554,843,366,354.88/643,951.20
  6. Step 6: Final answer
    x = 861,623.31

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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.