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Finding the Fourth Proportional to 906.87, 1,251.45 and 612.19

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Solution

The fourth proportional to 906.87, 1,251.45 and 612.19 is: 844.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.87 : 1,251.45 = 612.19 : x
  2. Step 2: Convert to fraction form
    906.87/1,251.45 = 612.19/x
  3. Step 3: Cross multiply
    906.87x = 1,251.45 × 612.19
  4. Step 4: Simplify right side
    906.87x = 766,125.18
  5. Step 5: Solve for x
    x = 766,125.18/906.87
  6. Step 6: Final answer
    x = 844.80

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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.