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Finding the Fourth Proportional to 372,536, 558,415 and 172,691.60

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Solution

The fourth proportional to 372,536, 558,415 and 172,691.60 is: 258,857.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,536 : 558,415 = 172,691.60 : x
  2. Step 2: Convert to fraction form
    372,536/558,415 = 172,691.60/x
  3. Step 3: Cross multiply
    372,536x = 558,415 × 172,691.60
  4. Step 4: Simplify right side
    372,536x = 96,433,579,814
  5. Step 5: Solve for x
    x = 96,433,579,814/372,536
  6. Step 6: Final answer
    x = 258,857.08

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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.