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Finding the Fourth Proportional to 307,087.20, 423,774.72 and 172,951.20

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Solution

The fourth proportional to 307,087.20, 423,774.72 and 172,951.20 is: 238,669.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,087.20 : 423,774.72 = 172,951.20 : x
  2. Step 2: Convert to fraction form
    307,087.20/423,774.72 = 172,951.20/x
  3. Step 3: Cross multiply
    307,087.20x = 423,774.72 × 172,951.20
  4. Step 4: Simplify right side
    307,087.20x = 73,292,346,353.66
  5. Step 5: Solve for x
    x = 73,292,346,353.66/307,087.20
  6. Step 6: Final answer
    x = 238,669.49

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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.