Home / 753,139.72-1,129,865.10-220,678.12

Finding the Fourth Proportional to 753,139.72, 1,129,865.10 and 220,678.12

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Solution

The fourth proportional to 753,139.72, 1,129,865.10 and 220,678.12 is: 331,062.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    753,139.72 : 1,129,865.10 = 220,678.12 : x
  2. Step 2: Convert to fraction form
    753,139.72/1,129,865.10 = 220,678.12/x
  3. Step 3: Cross multiply
    753,139.72x = 1,129,865.10 × 220,678.12
  4. Step 4: Simplify right side
    753,139.72x = 249,336,506,121.61
  5. Step 5: Solve for x
    x = 249,336,506,121.61/753,139.72
  6. Step 6: Final answer
    x = 331,062.75

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Double scale
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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.