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Finding the Fourth Proportional to 1,141.29, 1,575.09 and 669.24

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Solution

The fourth proportional to 1,141.29, 1,575.09 and 669.24 is: 923.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,141.29 : 1,575.09 = 669.24 : x
  2. Step 2: Convert to fraction form
    1,141.29/1,575.09 = 669.24/x
  3. Step 3: Cross multiply
    1,141.29x = 1,575.09 × 669.24
  4. Step 4: Simplify right side
    1,141.29x = 1,054,113.23
  5. Step 5: Solve for x
    x = 1,054,113.23/1,141.29
  6. Step 6: Final answer
    x = 923.62

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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.