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Finding the Fourth Proportional to 741.08, 1,110.78 and 557.90

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Solution

The fourth proportional to 741.08, 1,110.78 and 557.90 is: 836.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.08 : 1,110.78 = 557.90 : x
  2. Step 2: Convert to fraction form
    741.08/1,110.78 = 557.90/x
  3. Step 3: Cross multiply
    741.08x = 1,110.78 × 557.90
  4. Step 4: Simplify right side
    741.08x = 619,704.16
  5. Step 5: Solve for x
    x = 619,704.16/741.08
  6. Step 6: Final answer
    x = 836.22

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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.