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Finding the Fourth Proportional to 643,807.20, 966,148.20 and 359,497.20

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Solution

The fourth proportional to 643,807.20, 966,148.20 and 359,497.20 is: 539,490.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,807.20 : 966,148.20 = 359,497.20 : x
  2. Step 2: Convert to fraction form
    643,807.20/966,148.20 = 359,497.20/x
  3. Step 3: Cross multiply
    643,807.20x = 966,148.20 × 359,497.20
  4. Step 4: Simplify right side
    643,807.20x = 347,327,572,685.04
  5. Step 5: Solve for x
    x = 347,327,572,685.04/643,807.20
  6. Step 6: Final answer
    x = 539,490.04

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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.