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Finding the Fourth Proportional to 316,396.80, 474,520.32 and 91,697.76

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Solution

The fourth proportional to 316,396.80, 474,520.32 and 91,697.76 is: 137,524.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,396.80 : 474,520.32 = 91,697.76 : x
  2. Step 2: Convert to fraction form
    316,396.80/474,520.32 = 91,697.76/x
  3. Step 3: Cross multiply
    316,396.80x = 474,520.32 × 91,697.76
  4. Step 4: Simplify right side
    316,396.80x = 43,512,450,418.48
  5. Step 5: Solve for x
    x = 43,512,450,418.48/316,396.80
  6. Step 6: Final answer
    x = 137,524.94

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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.