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Finding the Fourth Proportional to 1,178.43, 1,626.30 and 654.46

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Solution

The fourth proportional to 1,178.43, 1,626.30 and 654.46 is: 903.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.43 : 1,626.30 = 654.46 : x
  2. Step 2: Convert to fraction form
    1,178.43/1,626.30 = 654.46/x
  3. Step 3: Cross multiply
    1,178.43x = 1,626.30 × 654.46
  4. Step 4: Simplify right side
    1,178.43x = 1,064,340.17
  5. Step 5: Solve for x
    x = 1,064,340.17/1,178.43
  6. Step 6: Final answer
    x = 903.19

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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.