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Finding the Fourth Proportional to 717,987.46, 991,076.46 and 641,373.51

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Solution

The fourth proportional to 717,987.46, 991,076.46 and 641,373.51 is: 885,322.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,987.46 : 991,076.46 = 641,373.51 : x
  2. Step 2: Convert to fraction form
    717,987.46/991,076.46 = 641,373.51/x
  3. Step 3: Cross multiply
    717,987.46x = 991,076.46 × 641,373.51
  4. Step 4: Simplify right side
    717,987.46x = 635,650,187,172.88
  5. Step 5: Solve for x
    x = 635,650,187,172.88/717,987.46
  6. Step 6: Final answer
    x = 885,322.13

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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.