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Finding the Fourth Proportional to 662.78, 914.12 and 463.56

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Solution

The fourth proportional to 662.78, 914.12 and 463.56 is: 639.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.78 : 914.12 = 463.56 : x
  2. Step 2: Convert to fraction form
    662.78/914.12 = 463.56/x
  3. Step 3: Cross multiply
    662.78x = 914.12 × 463.56
  4. Step 4: Simplify right side
    662.78x = 423,745.46
  5. Step 5: Solve for x
    x = 423,745.46/662.78
  6. Step 6: Final answer
    x = 639.34

Related Problems

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Half scale
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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.