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Finding the Fourth Proportional to 640.32, 960.35 and 332.39

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Solution

The fourth proportional to 640.32, 960.35 and 332.39 is: 498.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.32 : 960.35 = 332.39 : x
  2. Step 2: Convert to fraction form
    640.32/960.35 = 332.39/x
  3. Step 3: Cross multiply
    640.32x = 960.35 × 332.39
  4. Step 4: Simplify right side
    640.32x = 319,204.27
  5. Step 5: Solve for x
    x = 319,204.27/640.32
  6. Step 6: Final answer
    x = 498.51

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1.5x scale

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.