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Finding the Fourth Proportional to 487,189.56, 672,309.72 and 272,354.88

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Solution

The fourth proportional to 487,189.56, 672,309.72 and 272,354.88 is: 375,843.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,189.56 : 672,309.72 = 272,354.88 : x
  2. Step 2: Convert to fraction form
    487,189.56/672,309.72 = 272,354.88/x
  3. Step 3: Cross multiply
    487,189.56x = 672,309.72 × 272,354.88
  4. Step 4: Simplify right side
    487,189.56x = 183,106,833,113.43
  5. Step 5: Solve for x
    x = 183,106,833,113.43/487,189.56
  6. Step 6: Final answer
    x = 375,843.10

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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.