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Finding the Fourth Proportional to 1,146.75, 1,720.13 and 633.75

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Solution

The fourth proportional to 1,146.75, 1,720.13 and 633.75 is: 950.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.75 : 1,720.13 = 633.75 : x
  2. Step 2: Convert to fraction form
    1,146.75/1,720.13 = 633.75/x
  3. Step 3: Cross multiply
    1,146.75x = 1,720.13 × 633.75
  4. Step 4: Simplify right side
    1,146.75x = 1,090,129.22
  5. Step 5: Solve for x
    x = 1,090,129.22/1,146.75
  6. Step 6: Final answer
    x = 950.63

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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.