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Finding the Fourth Proportional to 1,180.65, 1,629.18 and 656.63

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Solution

The fourth proportional to 1,180.65, 1,629.18 and 656.63 is: 906.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,180.65 : 1,629.18 = 656.63 : x
  2. Step 2: Convert to fraction form
    1,180.65/1,629.18 = 656.63/x
  3. Step 3: Cross multiply
    1,180.65x = 1,629.18 × 656.63
  4. Step 4: Simplify right side
    1,180.65x = 1,069,768.46
  5. Step 5: Solve for x
    x = 1,069,768.46/1,180.65
  6. Step 6: Final answer
    x = 906.08

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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.