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Finding the Fourth Proportional to 745.67, 1,117.40 and 540.69

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Solution

The fourth proportional to 745.67, 1,117.40 and 540.69 is: 810.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.67 : 1,117.40 = 540.69 : x
  2. Step 2: Convert to fraction form
    745.67/1,117.40 = 540.69/x
  3. Step 3: Cross multiply
    745.67x = 1,117.40 × 540.69
  4. Step 4: Simplify right side
    745.67x = 604,164.30
  5. Step 5: Solve for x
    x = 604,164.30/745.67
  6. Step 6: Final answer
    x = 810.24

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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.