Home / 992,193.40-1,488,635.70-431,630.20

Finding the Fourth Proportional to 992,193.40, 1,488,635.70 and 431,630.20

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Solution

The fourth proportional to 992,193.40, 1,488,635.70 and 431,630.20 is: 647,595.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    992,193.40 : 1,488,635.70 = 431,630.20 : x
  2. Step 2: Convert to fraction form
    992,193.40/1,488,635.70 = 431,630.20/x
  3. Step 3: Cross multiply
    992,193.40x = 1,488,635.70 × 431,630.20
  4. Step 4: Simplify right side
    992,193.40x = 642,540,124,918.14
  5. Step 5: Solve for x
    x = 642,540,124,918.14/992,193.40
  6. Step 6: Final answer
    x = 647,595.65

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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.