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Finding the Fourth Proportional to 426,687.60, 640,283.90 and 157,005.12

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Solution

The fourth proportional to 426,687.60, 640,283.90 and 157,005.12 is: 235,600.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,687.60 : 640,283.90 = 157,005.12 : x
  2. Step 2: Convert to fraction form
    426,687.60/640,283.90 = 157,005.12/x
  3. Step 3: Cross multiply
    426,687.60x = 640,283.90 × 157,005.12
  4. Step 4: Simplify right side
    426,687.60x = 100,527,850,553.57
  5. Step 5: Solve for x
    x = 100,527,850,553.57/426,687.60
  6. Step 6: Final answer
    x = 235,600.59

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1.5x scale

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.