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Finding the Fourth Proportional to 372,885.60, 558,016.20 and 260,036.40

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Solution

The fourth proportional to 372,885.60, 558,016.20 and 260,036.40 is: 389,139.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,885.60 : 558,016.20 = 260,036.40 : x
  2. Step 2: Convert to fraction form
    372,885.60/558,016.20 = 260,036.40/x
  3. Step 3: Cross multiply
    372,885.60x = 558,016.20 × 260,036.40
  4. Step 4: Simplify right side
    372,885.60x = 145,104,523,789.68
  5. Step 5: Solve for x
    x = 145,104,523,789.68/372,885.60
  6. Step 6: Final answer
    x = 389,139.52

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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.