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Finding the Fourth Proportional to 1,076.86, 1,612.02 and 974.17

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Solution

The fourth proportional to 1,076.86, 1,612.02 and 974.17 is: 1,458.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,076.86 : 1,612.02 = 974.17 : x
  2. Step 2: Convert to fraction form
    1,076.86/1,612.02 = 974.17/x
  3. Step 3: Cross multiply
    1,076.86x = 1,612.02 × 974.17
  4. Step 4: Simplify right side
    1,076.86x = 1,570,381.52
  5. Step 5: Solve for x
    x = 1,570,381.52/1,076.86
  6. Step 6: Final answer
    x = 1,458.30

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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.