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Finding the Fourth Proportional to 215,479.32, 323,237.40 and 65,753.28

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Solution

The fourth proportional to 215,479.32, 323,237.40 and 65,753.28 is: 98,635.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,479.32 : 323,237.40 = 65,753.28 : x
  2. Step 2: Convert to fraction form
    215,479.32/323,237.40 = 65,753.28/x
  3. Step 3: Cross multiply
    215,479.32x = 323,237.40 × 65,753.28
  4. Step 4: Simplify right side
    215,479.32x = 21,253,919,268.67
  5. Step 5: Solve for x
    x = 21,253,919,268.67/215,479.32
  6. Step 6: Final answer
    x = 98,635.54

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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.