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Finding the Fourth Proportional to 717,546.31, 990,221.25 and 395,264.50

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Solution

The fourth proportional to 717,546.31, 990,221.25 and 395,264.50 is: 545,469.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,546.31 : 990,221.25 = 395,264.50 : x
  2. Step 2: Convert to fraction form
    717,546.31/990,221.25 = 395,264.50/x
  3. Step 3: Cross multiply
    717,546.31x = 990,221.25 × 395,264.50
  4. Step 4: Simplify right side
    717,546.31x = 391,399,307,270.63
  5. Step 5: Solve for x
    x = 391,399,307,270.63/717,546.31
  6. Step 6: Final answer
    x = 545,469.05

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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.