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Finding the Fourth Proportional to 611,279.10, 916,918.65 and 485,307.90

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Solution

The fourth proportional to 611,279.10, 916,918.65 and 485,307.90 is: 727,961.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,279.10 : 916,918.65 = 485,307.90 : x
  2. Step 2: Convert to fraction form
    611,279.10/916,918.65 = 485,307.90/x
  3. Step 3: Cross multiply
    611,279.10x = 916,918.65 × 485,307.90
  4. Step 4: Simplify right side
    611,279.10x = 444,987,864,502.34
  5. Step 5: Solve for x
    x = 444,987,864,502.34/611,279.10
  6. Step 6: Final answer
    x = 727,961.85

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Similar ratio
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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.