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Finding the Fourth Proportional to 312,611.28, 431,420.33 and 176,650.97

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Solution

The fourth proportional to 312,611.28, 431,420.33 and 176,650.97 is: 243,787.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,611.28 : 431,420.33 = 176,650.97 : x
  2. Step 2: Convert to fraction form
    312,611.28/431,420.33 = 176,650.97/x
  3. Step 3: Cross multiply
    312,611.28x = 431,420.33 × 176,650.97
  4. Step 4: Simplify right side
    312,611.28x = 76,210,816,731.86
  5. Step 5: Solve for x
    x = 76,210,816,731.86/312,611.28
  6. Step 6: Final answer
    x = 243,787.80

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1.5x scale

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.