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Finding the Fourth Proportional to 745.02, 1,117.80 and 667.80

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Solution

The fourth proportional to 745.02, 1,117.80 and 667.80 is: 1,001.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.02 : 1,117.80 = 667.80 : x
  2. Step 2: Convert to fraction form
    745.02/1,117.80 = 667.80/x
  3. Step 3: Cross multiply
    745.02x = 1,117.80 × 667.80
  4. Step 4: Simplify right side
    745.02x = 746,466.84
  5. Step 5: Solve for x
    x = 746,466.84/745.02
  6. Step 6: Final answer
    x = 1,001.94

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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.