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Finding the Fourth Proportional to 372,279.80, 558,419.74 and 260,178.96

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Solution

The fourth proportional to 372,279.80, 558,419.74 and 260,178.96 is: 390,268.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,279.80 : 558,419.74 = 260,178.96 : x
  2. Step 2: Convert to fraction form
    372,279.80/558,419.74 = 260,178.96/x
  3. Step 3: Cross multiply
    372,279.80x = 558,419.74 × 260,178.96
  4. Step 4: Simplify right side
    372,279.80x = 145,289,067,196.67
  5. Step 5: Solve for x
    x = 145,289,067,196.67/372,279.80
  6. Step 6: Final answer
    x = 390,268.47

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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.