Home / 420,266.62-579,965.13-238,978.56

Finding the Fourth Proportional to 420,266.62, 579,965.13 and 238,978.56

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Solution

The fourth proportional to 420,266.62, 579,965.13 and 238,978.56 is: 329,788.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,266.62 : 579,965.13 = 238,978.56 : x
  2. Step 2: Convert to fraction form
    420,266.62/579,965.13 = 238,978.56/x
  3. Step 3: Cross multiply
    420,266.62x = 579,965.13 × 238,978.56
  4. Step 4: Simplify right side
    420,266.62x = 138,599,231,617.61
  5. Step 5: Solve for x
    x = 138,599,231,617.61/420,266.62
  6. Step 6: Final answer
    x = 329,788.82

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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.