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Finding the Fourth Proportional to 332.60, 501.40 and 318.20

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Solution

The fourth proportional to 332.60, 501.40 and 318.20 is: 479.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    332.60 : 501.40 = 318.20 : x
  2. Step 2: Convert to fraction form
    332.60/501.40 = 318.20/x
  3. Step 3: Cross multiply
    332.60x = 501.40 × 318.20
  4. Step 4: Simplify right side
    332.60x = 159,545.48
  5. Step 5: Solve for x
    x = 159,545.48/332.60
  6. Step 6: Final answer
    x = 479.69

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.