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Finding the Fourth Proportional to 719,291.25, 992,551.23 and 396,980.53

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Solution

The fourth proportional to 719,291.25, 992,551.23 and 396,980.53 is: 547,794.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,291.25 : 992,551.23 = 396,980.53 : x
  2. Step 2: Convert to fraction form
    719,291.25/992,551.23 = 396,980.53/x
  3. Step 3: Cross multiply
    719,291.25x = 992,551.23 × 396,980.53
  4. Step 4: Simplify right side
    719,291.25x = 394,023,513,337.55
  5. Step 5: Solve for x
    x = 394,023,513,337.55/719,291.25
  6. Step 6: Final answer
    x = 547,794.11

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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.