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Finding the Fourth Proportional to 257.14, 354.74 and 158.86

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Solution

The fourth proportional to 257.14, 354.74 and 158.86 is: 219.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.14 : 354.74 = 158.86 : x
  2. Step 2: Convert to fraction form
    257.14/354.74 = 158.86/x
  3. Step 3: Cross multiply
    257.14x = 354.74 × 158.86
  4. Step 4: Simplify right side
    257.14x = 56,354.00
  5. Step 5: Solve for x
    x = 56,354.00/257.14
  6. Step 6: Final answer
    x = 219.16

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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.