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Finding the Fourth Proportional to 1,157.54, 1,736.19 and 291.87

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Solution

The fourth proportional to 1,157.54, 1,736.19 and 291.87 is: 437.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,157.54 : 1,736.19 = 291.87 : x
  2. Step 2: Convert to fraction form
    1,157.54/1,736.19 = 291.87/x
  3. Step 3: Cross multiply
    1,157.54x = 1,736.19 × 291.87
  4. Step 4: Simplify right side
    1,157.54x = 506,741.78
  5. Step 5: Solve for x
    x = 506,741.78/1,157.54
  6. Step 6: Final answer
    x = 437.78

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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.