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Finding the Fourth Proportional to 906.14, 1,358.06 and 772.49

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Solution

The fourth proportional to 906.14, 1,358.06 and 772.49 is: 1,157.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.14 : 1,358.06 = 772.49 : x
  2. Step 2: Convert to fraction form
    906.14/1,358.06 = 772.49/x
  3. Step 3: Cross multiply
    906.14x = 1,358.06 × 772.49
  4. Step 4: Simplify right side
    906.14x = 1,049,077.12
  5. Step 5: Solve for x
    x = 1,049,077.12/906.14
  6. Step 6: Final answer
    x = 1,157.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.