Home / 991,399.52-1,368,139.68-538,690.56

Finding the Fourth Proportional to 991,399.52, 1,368,139.68 and 538,690.56

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Solution

The fourth proportional to 991,399.52, 1,368,139.68 and 538,690.56 is: 743,397.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,399.52 : 1,368,139.68 = 538,690.56 : x
  2. Step 2: Convert to fraction form
    991,399.52/1,368,139.68 = 538,690.56/x
  3. Step 3: Cross multiply
    991,399.52x = 1,368,139.68 × 538,690.56
  4. Step 4: Simplify right side
    991,399.52x = 737,003,930,377.42
  5. Step 5: Solve for x
    x = 737,003,930,377.42/991,399.52
  6. Step 6: Final answer
    x = 743,397.51

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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.