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Finding the Fourth Proportional to 719,423.22, 992,806.42 and 397,132.55

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Solution

The fourth proportional to 719,423.22, 992,806.42 and 397,132.55 is: 548,044.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,423.22 : 992,806.42 = 397,132.55 : x
  2. Step 2: Convert to fraction form
    719,423.22/992,806.42 = 397,132.55/x
  3. Step 3: Cross multiply
    719,423.22x = 992,806.42 × 397,132.55
  4. Step 4: Simplify right side
    719,423.22x = 394,275,740,949.49
  5. Step 5: Solve for x
    x = 394,275,740,949.49/719,423.22
  6. Step 6: Final answer
    x = 548,044.23

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1.5x scale

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.