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Finding the Fourth Proportional to 257.12, 354.68 and 152.17

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Solution

The fourth proportional to 257.12, 354.68 and 152.17 is: 209.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.12 : 354.68 = 152.17 : x
  2. Step 2: Convert to fraction form
    257.12/354.68 = 152.17/x
  3. Step 3: Cross multiply
    257.12x = 354.68 × 152.17
  4. Step 4: Simplify right side
    257.12x = 53,970.01
  5. Step 5: Solve for x
    x = 53,970.01/257.12
  6. Step 6: Final answer
    x = 209.91

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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.