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Finding the Fourth Proportional to 905.75, 1,250.09 and 512.76

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Solution

The fourth proportional to 905.75, 1,250.09 and 512.76 is: 707.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    905.75 : 1,250.09 = 512.76 : x
  2. Step 2: Convert to fraction form
    905.75/1,250.09 = 512.76/x
  3. Step 3: Cross multiply
    905.75x = 1,250.09 × 512.76
  4. Step 4: Simplify right side
    905.75x = 641,000.20
  5. Step 5: Solve for x
    x = 641,000.20/905.75
  6. Step 6: Final answer
    x = 707.70

Related Problems

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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.