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Finding the Fourth Proportional to 717,984.10, 991,071.82 and 641,370.15

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Solution

The fourth proportional to 717,984.10, 991,071.82 and 641,370.15 is: 885,317.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,984.10 : 991,071.82 = 641,370.15 : x
  2. Step 2: Convert to fraction form
    717,984.10/991,071.82 = 641,370.15/x
  3. Step 3: Cross multiply
    717,984.10x = 991,071.82 × 641,370.15
  4. Step 4: Simplify right side
    717,984.10x = 635,643,882,655.89
  5. Step 5: Solve for x
    x = 635,643,882,655.89/717,984.10
  6. Step 6: Final answer
    x = 885,317.49

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.