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Finding the Fourth Proportional to 245.52, 338.86 and 157.08

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Solution

The fourth proportional to 245.52, 338.86 and 157.08 is: 216.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.52 : 338.86 = 157.08 : x
  2. Step 2: Convert to fraction form
    245.52/338.86 = 157.08/x
  3. Step 3: Cross multiply
    245.52x = 338.86 × 157.08
  4. Step 4: Simplify right side
    245.52x = 53,228.13
  5. Step 5: Solve for x
    x = 53,228.13/245.52
  6. Step 6: Final answer
    x = 216.80

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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.