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Finding the Fourth Proportional to 1,114.32, 1,537.80 and 616.98

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Solution

The fourth proportional to 1,114.32, 1,537.80 and 616.98 is: 851.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114.32 : 1,537.80 = 616.98 : x
  2. Step 2: Convert to fraction form
    1,114.32/1,537.80 = 616.98/x
  3. Step 3: Cross multiply
    1,114.32x = 1,537.80 × 616.98
  4. Step 4: Simplify right side
    1,114.32x = 948,791.84
  5. Step 5: Solve for x
    x = 948,791.84/1,114.32
  6. Step 6: Final answer
    x = 851.45

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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.