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Finding the Fourth Proportional to 718.60, 1,077.36 and 371.74

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Solution

The fourth proportional to 718.60, 1,077.36 and 371.74 is: 557.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.60 : 1,077.36 = 371.74 : x
  2. Step 2: Convert to fraction form
    718.60/1,077.36 = 371.74/x
  3. Step 3: Cross multiply
    718.60x = 1,077.36 × 371.74
  4. Step 4: Simplify right side
    718.60x = 400,497.81
  5. Step 5: Solve for x
    x = 400,497.81/718.60
  6. Step 6: Final answer
    x = 557.33

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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.