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Finding the Fourth Proportional to 1,156.70, 1,734.97 and 291.02

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Solution

The fourth proportional to 1,156.70, 1,734.97 and 291.02 is: 436.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,156.70 : 1,734.97 = 291.02 : x
  2. Step 2: Convert to fraction form
    1,156.70/1,734.97 = 291.02/x
  3. Step 3: Cross multiply
    1,156.70x = 1,734.97 × 291.02
  4. Step 4: Simplify right side
    1,156.70x = 504,910.97
  5. Step 5: Solve for x
    x = 504,910.97/1,156.70
  6. Step 6: Final answer
    x = 436.51

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.