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Finding the Fourth Proportional to 393,565.79, 543,114.52 and 219,134.31

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Solution

The fourth proportional to 393,565.79, 543,114.52 and 219,134.31 is: 302,401.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,565.79 : 543,114.52 = 219,134.31 : x
  2. Step 2: Convert to fraction form
    393,565.79/543,114.52 = 219,134.31/x
  3. Step 3: Cross multiply
    393,565.79x = 543,114.52 × 219,134.31
  4. Step 4: Simplify right side
    393,565.79x = 119,015,025,853.30
  5. Step 5: Solve for x
    x = 119,015,025,853.30/393,565.79
  6. Step 6: Final answer
    x = 302,401.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.