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Finding the Fourth Proportional to 1,134.10, 1,564.95 and 691.93

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Solution

The fourth proportional to 1,134.10, 1,564.95 and 691.93 is: 954.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,134.10 : 1,564.95 = 691.93 : x
  2. Step 2: Convert to fraction form
    1,134.10/1,564.95 = 691.93/x
  3. Step 3: Cross multiply
    1,134.10x = 1,564.95 × 691.93
  4. Step 4: Simplify right side
    1,134.10x = 1,082,835.85
  5. Step 5: Solve for x
    x = 1,082,835.85/1,134.10
  6. Step 6: Final answer
    x = 954.80

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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.