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Finding the Fourth Proportional to 1,157.56, 1,736.35 and 291.88

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Solution

The fourth proportional to 1,157.56, 1,736.35 and 291.88 is: 437.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,157.56 : 1,736.35 = 291.88 : x
  2. Step 2: Convert to fraction form
    1,157.56/1,736.35 = 291.88/x
  3. Step 3: Cross multiply
    1,157.56x = 1,736.35 × 291.88
  4. Step 4: Simplify right side
    1,157.56x = 506,805.84
  5. Step 5: Solve for x
    x = 506,805.84/1,157.56
  6. Step 6: Final answer
    x = 437.82

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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.