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Finding the Fourth Proportional to 426,957.08, 640,412.52 and 216,589.56

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Solution

The fourth proportional to 426,957.08, 640,412.52 and 216,589.56 is: 324,872.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,957.08 : 640,412.52 = 216,589.56 : x
  2. Step 2: Convert to fraction form
    426,957.08/640,412.52 = 216,589.56/x
  3. Step 3: Cross multiply
    426,957.08x = 640,412.52 × 216,589.56
  4. Step 4: Simplify right side
    426,957.08x = 138,706,665,925.29
  5. Step 5: Solve for x
    x = 138,706,665,925.29/426,957.08
  6. Step 6: Final answer
    x = 324,872.62

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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.