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Finding the Fourth Proportional to 642,588.43, 963,892.88 and 243,121.94

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Solution

The fourth proportional to 642,588.43, 963,892.88 and 243,121.94 is: 364,686.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,588.43 : 963,892.88 = 243,121.94 : x
  2. Step 2: Convert to fraction form
    642,588.43/963,892.88 = 243,121.94/x
  3. Step 3: Cross multiply
    642,588.43x = 963,892.88 × 243,121.94
  4. Step 4: Simplify right side
    642,588.43x = 234,343,506,937.79
  5. Step 5: Solve for x
    x = 234,343,506,937.79/642,588.43
  6. Step 6: Final answer
    x = 364,686.78

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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.