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Finding the Fourth Proportional to 899.45, 1,238.12 and 775.52

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Solution

The fourth proportional to 899.45, 1,238.12 and 775.52 is: 1,067.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.45 : 1,238.12 = 775.52 : x
  2. Step 2: Convert to fraction form
    899.45/1,238.12 = 775.52/x
  3. Step 3: Cross multiply
    899.45x = 1,238.12 × 775.52
  4. Step 4: Simplify right side
    899.45x = 960,188.76
  5. Step 5: Solve for x
    x = 960,188.76/899.45
  6. Step 6: Final answer
    x = 1,067.53

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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.