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Finding the Fourth Proportional to 426,687.10, 640,283.15 and 157,004.62

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Solution

The fourth proportional to 426,687.10, 640,283.15 and 157,004.62 is: 235,599.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,687.10 : 640,283.15 = 157,004.62 : x
  2. Step 2: Convert to fraction form
    426,687.10/640,283.15 = 157,004.62/x
  3. Step 3: Cross multiply
    426,687.10x = 640,283.15 × 157,004.62
  4. Step 4: Simplify right side
    426,687.10x = 100,527,409,456.74
  5. Step 5: Solve for x
    x = 100,527,409,456.74/426,687.10
  6. Step 6: Final answer
    x = 235,599.83

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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.