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Finding the Fourth Proportional to 634.10, 951.15 and 490.10

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Solution

The fourth proportional to 634.10, 951.15 and 490.10 is: 735.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.10 : 951.15 = 490.10 : x
  2. Step 2: Convert to fraction form
    634.10/951.15 = 490.10/x
  3. Step 3: Cross multiply
    634.10x = 951.15 × 490.10
  4. Step 4: Simplify right side
    634.10x = 466,158.62
  5. Step 5: Solve for x
    x = 466,158.62/634.10
  6. Step 6: Final answer
    x = 735.15

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Half scale
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Double scale
Find fourth proportional to 635.10, 952.65 and 491.10
Similar ratio
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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.