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Finding the Fourth Proportional to 1,114.70, 1,537.90 and 694.77

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Solution

The fourth proportional to 1,114.70, 1,537.90 and 694.77 is: 958.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114.70 : 1,537.90 = 694.77 : x
  2. Step 2: Convert to fraction form
    1,114.70/1,537.90 = 694.77/x
  3. Step 3: Cross multiply
    1,114.70x = 1,537.90 × 694.77
  4. Step 4: Simplify right side
    1,114.70x = 1,068,486.78
  5. Step 5: Solve for x
    x = 1,068,486.78/1,114.70
  6. Step 6: Final answer
    x = 958.54

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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.