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Finding the Fourth Proportional to 642,588.10, 886,806.88 and 356,102.04

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Solution

The fourth proportional to 642,588.10, 886,806.88 and 356,102.04 is: 491,440.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,588.10 : 886,806.88 = 356,102.04 : x
  2. Step 2: Convert to fraction form
    642,588.10/886,806.88 = 356,102.04/x
  3. Step 3: Cross multiply
    642,588.10x = 886,806.88 × 356,102.04
  4. Step 4: Simplify right side
    642,588.10x = 315,793,732,839.49
  5. Step 5: Solve for x
    x = 315,793,732,839.49/642,588.10
  6. Step 6: Final answer
    x = 491,440.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.