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Finding the Fourth Proportional to 863.35, 1,191.39 and 470.37

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Solution

The fourth proportional to 863.35, 1,191.39 and 470.37 is: 649.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.35 : 1,191.39 = 470.37 : x
  2. Step 2: Convert to fraction form
    863.35/1,191.39 = 470.37/x
  3. Step 3: Cross multiply
    863.35x = 1,191.39 × 470.37
  4. Step 4: Simplify right side
    863.35x = 560,396.82
  5. Step 5: Solve for x
    x = 560,396.82/863.35
  6. Step 6: Final answer
    x = 649.10

Related Problems

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Half scale
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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.