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Finding the Fourth Proportional to 1,114.66, 1,538.29 and 617.35

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Solution

The fourth proportional to 1,114.66, 1,538.29 and 617.35 is: 851.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114.66 : 1,538.29 = 617.35 : x
  2. Step 2: Convert to fraction form
    1,114.66/1,538.29 = 617.35/x
  3. Step 3: Cross multiply
    1,114.66x = 1,538.29 × 617.35
  4. Step 4: Simplify right side
    1,114.66x = 949,663.33
  5. Step 5: Solve for x
    x = 949,663.33/1,114.66
  6. Step 6: Final answer
    x = 851.98

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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.