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Finding the Fourth Proportional to 218,739.40, 328,109.10 and 187,246.60

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Solution

The fourth proportional to 218,739.40, 328,109.10 and 187,246.60 is: 280,869.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,739.40 : 328,109.10 = 187,246.60 : x
  2. Step 2: Convert to fraction form
    218,739.40/328,109.10 = 187,246.60/x
  3. Step 3: Cross multiply
    218,739.40x = 328,109.10 × 187,246.60
  4. Step 4: Simplify right side
    218,739.40x = 61,437,313,404.06
  5. Step 5: Solve for x
    x = 61,437,313,404.06/218,739.40
  6. Step 6: Final answer
    x = 280,869.90

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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.