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Finding the Fourth Proportional to 649,812.52, 974,718.78 and 428,144.68

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Solution

The fourth proportional to 649,812.52, 974,718.78 and 428,144.68 is: 642,217.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,812.52 : 974,718.78 = 428,144.68 : x
  2. Step 2: Convert to fraction form
    649,812.52/974,718.78 = 428,144.68/x
  3. Step 3: Cross multiply
    649,812.52x = 974,718.78 × 428,144.68
  4. Step 4: Simplify right side
    649,812.52x = 417,320,660,153.09
  5. Step 5: Solve for x
    x = 417,320,660,153.09/649,812.52
  6. Step 6: Final answer
    x = 642,217.02

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Similar ratio
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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.