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Finding the Fourth Proportional to 1,176.60, 1,623.66 and 679.38

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Solution

The fourth proportional to 1,176.60, 1,623.66 and 679.38 is: 937.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,176.60 : 1,623.66 = 679.38 : x
  2. Step 2: Convert to fraction form
    1,176.60/1,623.66 = 679.38/x
  3. Step 3: Cross multiply
    1,176.60x = 1,623.66 × 679.38
  4. Step 4: Simplify right side
    1,176.60x = 1,103,082.13
  5. Step 5: Solve for x
    x = 1,103,082.13/1,176.60
  6. Step 6: Final answer
    x = 937.52

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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.