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Finding the Fourth Proportional to 742.26, 1,111.77 and 587.01

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Solution

The fourth proportional to 742.26, 1,111.77 and 587.01 is: 879.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.26 : 1,111.77 = 587.01 : x
  2. Step 2: Convert to fraction form
    742.26/1,111.77 = 587.01/x
  3. Step 3: Cross multiply
    742.26x = 1,111.77 × 587.01
  4. Step 4: Simplify right side
    742.26x = 652,620.11
  5. Step 5: Solve for x
    x = 652,620.11/742.26
  6. Step 6: Final answer
    x = 879.23

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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.