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Finding the Fourth Proportional to 1,076.91, 1,615.01 and 418.74

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Solution

The fourth proportional to 1,076.91, 1,615.01 and 418.74 is: 627.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,076.91 : 1,615.01 = 418.74 : x
  2. Step 2: Convert to fraction form
    1,076.91/1,615.01 = 418.74/x
  3. Step 3: Cross multiply
    1,076.91x = 1,615.01 × 418.74
  4. Step 4: Simplify right side
    1,076.91x = 676,263.68
  5. Step 5: Solve for x
    x = 676,263.68/1,076.91
  6. Step 6: Final answer
    x = 627.97

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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.