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Finding the Fourth Proportional to 1,167.69, 1,611.93 and 814.13

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Solution

The fourth proportional to 1,167.69, 1,611.93 and 814.13 is: 1,123.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,167.69 : 1,611.93 = 814.13 : x
  2. Step 2: Convert to fraction form
    1,167.69/1,611.93 = 814.13/x
  3. Step 3: Cross multiply
    1,167.69x = 1,611.93 × 814.13
  4. Step 4: Simplify right side
    1,167.69x = 1,312,310.21
  5. Step 5: Solve for x
    x = 1,312,310.21/1,167.69
  6. Step 6: Final answer
    x = 1,123.85

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Half scale
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Double scale
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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.