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Finding the Fourth Proportional to 1,180.71, 1,630.80 and 960.53

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Solution

The fourth proportional to 1,180.71, 1,630.80 and 960.53 is: 1,326.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,180.71 : 1,630.80 = 960.53 : x
  2. Step 2: Convert to fraction form
    1,180.71/1,630.80 = 960.53/x
  3. Step 3: Cross multiply
    1,180.71x = 1,630.80 × 960.53
  4. Step 4: Simplify right side
    1,180.71x = 1,566,424.17
  5. Step 5: Solve for x
    x = 1,566,424.17/1,180.71
  6. Step 6: Final answer
    x = 1,326.68

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1.5x scale

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.