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Finding the Fourth Proportional to 454.75, 627.56 and 247.75

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Solution

The fourth proportional to 454.75, 627.56 and 247.75 is: 341.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.75 : 627.56 = 247.75 : x
  2. Step 2: Convert to fraction form
    454.75/627.56 = 247.75/x
  3. Step 3: Cross multiply
    454.75x = 627.56 × 247.75
  4. Step 4: Simplify right side
    454.75x = 155,477.99
  5. Step 5: Solve for x
    x = 155,477.99/454.75
  6. Step 6: Final answer
    x = 341.90

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Find fourth proportional to 227.38, 313.78 and 123.88
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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.