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Finding the Fourth Proportional to 357.20, 492.68 and 240.72

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Solution

The fourth proportional to 357.20, 492.68 and 240.72 is: 332.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.20 : 492.68 = 240.72 : x
  2. Step 2: Convert to fraction form
    357.20/492.68 = 240.72/x
  3. Step 3: Cross multiply
    357.20x = 492.68 × 240.72
  4. Step 4: Simplify right side
    357.20x = 118,597.93
  5. Step 5: Solve for x
    x = 118,597.93/357.20
  6. Step 6: Final answer
    x = 332.02

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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.