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Finding the Fourth Proportional to 245.58, 339.05 and 157.11

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Solution

The fourth proportional to 245.58, 339.05 and 157.11 is: 216.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.58 : 339.05 = 157.11 : x
  2. Step 2: Convert to fraction form
    245.58/339.05 = 157.11/x
  3. Step 3: Cross multiply
    245.58x = 339.05 × 157.11
  4. Step 4: Simplify right side
    245.58x = 53,267.36
  5. Step 5: Solve for x
    x = 53,267.36/245.58
  6. Step 6: Final answer
    x = 216.90

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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.