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Finding the Fourth Proportional to 1,141.27, 1,574.86 and 669.11

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Solution

The fourth proportional to 1,141.27, 1,574.86 and 669.11 is: 923.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,141.27 : 1,574.86 = 669.11 : x
  2. Step 2: Convert to fraction form
    1,141.27/1,574.86 = 669.11/x
  3. Step 3: Cross multiply
    1,141.27x = 1,574.86 × 669.11
  4. Step 4: Simplify right side
    1,141.27x = 1,053,754.57
  5. Step 5: Solve for x
    x = 1,053,754.57/1,141.27
  6. Step 6: Final answer
    x = 923.32

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1.5x scale

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.