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Finding the Fourth Proportional to 316,761.45, 475,042.80 and 103,480.74

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Solution

The fourth proportional to 316,761.45, 475,042.80 and 103,480.74 is: 155,188.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,761.45 : 475,042.80 = 103,480.74 : x
  2. Step 2: Convert to fraction form
    316,761.45/475,042.80 = 103,480.74/x
  3. Step 3: Cross multiply
    316,761.45x = 475,042.80 × 103,480.74
  4. Step 4: Simplify right side
    316,761.45x = 49,157,780,475.67
  5. Step 5: Solve for x
    x = 49,157,780,475.67/316,761.45
  6. Step 6: Final answer
    x = 155,188.65

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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.