Home / 721,134.72-1,081,729.08-215,702.28

Finding the Fourth Proportional to 721,134.72, 1,081,729.08 and 215,702.28

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Solution

The fourth proportional to 721,134.72, 1,081,729.08 and 215,702.28 is: 323,561.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,134.72 : 1,081,729.08 = 215,702.28 : x
  2. Step 2: Convert to fraction form
    721,134.72/1,081,729.08 = 215,702.28/x
  3. Step 3: Cross multiply
    721,134.72x = 1,081,729.08 × 215,702.28
  4. Step 4: Simplify right side
    721,134.72x = 233,331,428,898.30
  5. Step 5: Solve for x
    x = 233,331,428,898.30/721,134.72
  6. Step 6: Final answer
    x = 323,561.50

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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.