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Finding the Fourth Proportional to 487,278.93, 672,446.42 and 272,419

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Solution

The fourth proportional to 487,278.93, 672,446.42 and 272,419 is: 375,939.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,278.93 : 672,446.42 = 272,419 : x
  2. Step 2: Convert to fraction form
    487,278.93/672,446.42 = 272,419/x
  3. Step 3: Cross multiply
    487,278.93x = 672,446.42 × 272,419
  4. Step 4: Simplify right side
    487,278.93x = 183,187,181,289.98
  5. Step 5: Solve for x
    x = 183,187,181,289.98/487,278.93
  6. Step 6: Final answer
    x = 375,939.06

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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.