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Finding the Fourth Proportional to 1,179.16, 1,627.10 and 655.12

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Solution

The fourth proportional to 1,179.16, 1,627.10 and 655.12 is: 903.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179.16 : 1,627.10 = 655.12 : x
  2. Step 2: Convert to fraction form
    1,179.16/1,627.10 = 655.12/x
  3. Step 3: Cross multiply
    1,179.16x = 1,627.10 × 655.12
  4. Step 4: Simplify right side
    1,179.16x = 1,065,945.75
  5. Step 5: Solve for x
    x = 1,065,945.75/1,179.16
  6. Step 6: Final answer
    x = 903.99

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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.