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Finding the Fourth Proportional to 332.80, 498.30 and 260.20

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Solution

The fourth proportional to 332.80, 498.30 and 260.20 is: 389.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    332.80 : 498.30 = 260.20 : x
  2. Step 2: Convert to fraction form
    332.80/498.30 = 260.20/x
  3. Step 3: Cross multiply
    332.80x = 498.30 × 260.20
  4. Step 4: Simplify right side
    332.80x = 129,657.66
  5. Step 5: Solve for x
    x = 129,657.66/332.80
  6. Step 6: Final answer
    x = 389.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.