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Finding the Fourth Proportional to 219,318.40, 328,394.40 and 140,003.20

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Solution

The fourth proportional to 219,318.40, 328,394.40 and 140,003.20 is: 209,632.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,318.40 : 328,394.40 = 140,003.20 : x
  2. Step 2: Convert to fraction form
    219,318.40/328,394.40 = 140,003.20/x
  3. Step 3: Cross multiply
    219,318.40x = 328,394.40 × 140,003.20
  4. Step 4: Simplify right side
    219,318.40x = 45,976,266,862.08
  5. Step 5: Solve for x
    x = 45,976,266,862.08/219,318.40
  6. Step 6: Final answer
    x = 209,632.51

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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.