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Finding the Fourth Proportional to 1,114.15, 1,536.01 and 939.19

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Solution

The fourth proportional to 1,114.15, 1,536.01 and 939.19 is: 1,294.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114.15 : 1,536.01 = 939.19 : x
  2. Step 2: Convert to fraction form
    1,114.15/1,536.01 = 939.19/x
  3. Step 3: Cross multiply
    1,114.15x = 1,536.01 × 939.19
  4. Step 4: Simplify right side
    1,114.15x = 1,442,605.23
  5. Step 5: Solve for x
    x = 1,442,605.23/1,114.15
  6. Step 6: Final answer
    x = 1,294.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.