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Finding the Fourth Proportional to 1,114.40, 1,537.80 and 617.00

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Solution

The fourth proportional to 1,114.40, 1,537.80 and 617.00 is: 851.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114.40 : 1,537.80 = 617.00 : x
  2. Step 2: Convert to fraction form
    1,114.40/1,537.80 = 617.00/x
  3. Step 3: Cross multiply
    1,114.40x = 1,537.80 × 617.00
  4. Step 4: Simplify right side
    1,114.40x = 948,826.44
  5. Step 5: Solve for x
    x = 948,826.44/1,114.40
  6. Step 6: Final answer
    x = 851.43

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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.