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Finding the Fourth Proportional to 906.70, 1,250.78 and 574.56

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Solution

The fourth proportional to 906.70, 1,250.78 and 574.56 is: 792.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.70 : 1,250.78 = 574.56 : x
  2. Step 2: Convert to fraction form
    906.70/1,250.78 = 574.56/x
  3. Step 3: Cross multiply
    906.70x = 1,250.78 × 574.56
  4. Step 4: Simplify right side
    906.70x = 718,648.16
  5. Step 5: Solve for x
    x = 718,648.16/906.70
  6. Step 6: Final answer
    x = 792.60

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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.