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Finding the Fourth Proportional to 1,178.68, 1,626.59 and 654.74

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Solution

The fourth proportional to 1,178.68, 1,626.59 and 654.74 is: 903.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.68 : 1,626.59 = 654.74 : x
  2. Step 2: Convert to fraction form
    1,178.68/1,626.59 = 654.74/x
  3. Step 3: Cross multiply
    1,178.68x = 1,626.59 × 654.74
  4. Step 4: Simplify right side
    1,178.68x = 1,064,999.24
  5. Step 5: Solve for x
    x = 1,064,999.24/1,178.68
  6. Step 6: Final answer
    x = 903.55

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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.