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Finding the Fourth Proportional to 1,354.65, 1,869.03 and 935.12

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Solution

The fourth proportional to 1,354.65, 1,869.03 and 935.12 is: 1,290.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,354.65 : 1,869.03 = 935.12 : x
  2. Step 2: Convert to fraction form
    1,354.65/1,869.03 = 935.12/x
  3. Step 3: Cross multiply
    1,354.65x = 1,869.03 × 935.12
  4. Step 4: Simplify right side
    1,354.65x = 1,747,757.99
  5. Step 5: Solve for x
    x = 1,747,757.99/1,354.65
  6. Step 6: Final answer
    x = 1,290.19

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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.