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Finding the Fourth Proportional to 628.76, 867.67 and 363.16

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Solution

The fourth proportional to 628.76, 867.67 and 363.16 is: 501.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.76 : 867.67 = 363.16 : x
  2. Step 2: Convert to fraction form
    628.76/867.67 = 363.16/x
  3. Step 3: Cross multiply
    628.76x = 867.67 × 363.16
  4. Step 4: Simplify right side
    628.76x = 315,103.20
  5. Step 5: Solve for x
    x = 315,103.20/628.76
  6. Step 6: Final answer
    x = 501.15

Related Problems

Find fourth proportional to 314.38, 433.83 and 181.58
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Double scale
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Similar ratio
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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.