Home / 992,472.75-1,488,709.13-431,507.25

Finding the Fourth Proportional to 992,472.75, 1,488,709.13 and 431,507.25

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Solution

The fourth proportional to 992,472.75, 1,488,709.13 and 431,507.25 is: 647,260.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    992,472.75 : 1,488,709.13 = 431,507.25 : x
  2. Step 2: Convert to fraction form
    992,472.75/1,488,709.13 = 431,507.25/x
  3. Step 3: Cross multiply
    992,472.75x = 1,488,709.13 × 431,507.25
  4. Step 4: Simplify right side
    992,472.75x = 642,388,780,578.66
  5. Step 5: Solve for x
    x = 642,388,780,578.66/992,472.75
  6. Step 6: Final answer
    x = 647,260.88

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.