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Finding the Fourth Proportional to 906.72, 1,250.64 and 612.24

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Solution

The fourth proportional to 906.72, 1,250.64 and 612.24 is: 844.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.72 : 1,250.64 = 612.24 : x
  2. Step 2: Convert to fraction form
    906.72/1,250.64 = 612.24/x
  3. Step 3: Cross multiply
    906.72x = 1,250.64 × 612.24
  4. Step 4: Simplify right side
    906.72x = 765,691.83
  5. Step 5: Solve for x
    x = 765,691.83/906.72
  6. Step 6: Final answer
    x = 844.46

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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.