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Finding the Fourth Proportional to 719,407.28, 992,782.23 and 397,117.59

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Solution

The fourth proportional to 719,407.28, 992,782.23 and 397,117.59 is: 548,022.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,407.28 : 992,782.23 = 397,117.59 : x
  2. Step 2: Convert to fraction form
    719,407.28/992,782.23 = 397,117.59/x
  3. Step 3: Cross multiply
    719,407.28x = 992,782.23 × 397,117.59
  4. Step 4: Simplify right side
    719,407.28x = 394,251,286,572.43
  5. Step 5: Solve for x
    x = 394,251,286,572.43/719,407.28
  6. Step 6: Final answer
    x = 548,022.38

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Double scale
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Similar ratio
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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.