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Finding the Fourth Proportional to 745.15, 1,118.23 and 559.66

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Solution

The fourth proportional to 745.15, 1,118.23 and 559.66 is: 839.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.15 : 1,118.23 = 559.66 : x
  2. Step 2: Convert to fraction form
    745.15/1,118.23 = 559.66/x
  3. Step 3: Cross multiply
    745.15x = 1,118.23 × 559.66
  4. Step 4: Simplify right side
    745.15x = 625,824.41
  5. Step 5: Solve for x
    x = 625,824.41/745.15
  6. Step 6: Final answer
    x = 839.87

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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.