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Finding the Fourth Proportional to 332.40, 498.76 and 317

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Solution

The fourth proportional to 332.40, 498.76 and 317 is: 475.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    332.40 : 498.76 = 317 : x
  2. Step 2: Convert to fraction form
    332.40/498.76 = 317/x
  3. Step 3: Cross multiply
    332.40x = 498.76 × 317
  4. Step 4: Simplify right side
    332.40x = 158,106.92
  5. Step 5: Solve for x
    x = 158,106.92/332.40
  6. Step 6: Final answer
    x = 475.65

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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.