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Finding the Fourth Proportional to 672.67, 928.74 and 440.20

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Solution

The fourth proportional to 672.67, 928.74 and 440.20 is: 607.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.67 : 928.74 = 440.20 : x
  2. Step 2: Convert to fraction form
    672.67/928.74 = 440.20/x
  3. Step 3: Cross multiply
    672.67x = 928.74 × 440.20
  4. Step 4: Simplify right side
    672.67x = 408,831.35
  5. Step 5: Solve for x
    x = 408,831.35/672.67
  6. Step 6: Final answer
    x = 607.77

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Double scale
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1.5x scale

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.