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Finding the Fourth Proportional to 1,179.19, 1,627.30 and 648.08

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Solution

The fourth proportional to 1,179.19, 1,627.30 and 648.08 is: 894.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179.19 : 1,627.30 = 648.08 : x
  2. Step 2: Convert to fraction form
    1,179.19/1,627.30 = 648.08/x
  3. Step 3: Cross multiply
    1,179.19x = 1,627.30 × 648.08
  4. Step 4: Simplify right side
    1,179.19x = 1,054,622.20
  5. Step 5: Solve for x
    x = 1,054,622.20/1,179.19
  6. Step 6: Final answer
    x = 894.37

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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.