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Finding the Fourth Proportional to 718.12, 1,076.10 and 393.04

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Solution

The fourth proportional to 718.12, 1,076.10 and 393.04 is: 588.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.12 : 1,076.10 = 393.04 : x
  2. Step 2: Convert to fraction form
    718.12/1,076.10 = 393.04/x
  3. Step 3: Cross multiply
    718.12x = 1,076.10 × 393.04
  4. Step 4: Simplify right side
    718.12x = 422,950.34
  5. Step 5: Solve for x
    x = 422,950.34/718.12
  6. Step 6: Final answer
    x = 588.97

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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.