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Finding the Fourth Proportional to 642,613.50, 886,806.63 and 356,152.04

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Solution

The fourth proportional to 642,613.50, 886,806.63 and 356,152.04 is: 491,489.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,613.50 : 886,806.63 = 356,152.04 : x
  2. Step 2: Convert to fraction form
    642,613.50/886,806.63 = 356,152.04/x
  3. Step 3: Cross multiply
    642,613.50x = 886,806.63 × 356,152.04
  4. Step 4: Simplify right side
    642,613.50x = 315,837,989,251.52
  5. Step 5: Solve for x
    x = 315,837,989,251.52/642,613.50
  6. Step 6: Final answer
    x = 491,489.81

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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.