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Finding the Fourth Proportional to 1,107.23, 1,527.93 and 665.17

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Solution

The fourth proportional to 1,107.23, 1,527.93 and 665.17 is: 917.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107.23 : 1,527.93 = 665.17 : x
  2. Step 2: Convert to fraction form
    1,107.23/1,527.93 = 665.17/x
  3. Step 3: Cross multiply
    1,107.23x = 1,527.93 × 665.17
  4. Step 4: Simplify right side
    1,107.23x = 1,016,329.38
  5. Step 5: Solve for x
    x = 1,016,329.38/1,107.23
  6. Step 6: Final answer
    x = 917.91

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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.