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Finding the Fourth Proportional to 900.91, 1,351.37 and 251.63

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Solution

The fourth proportional to 900.91, 1,351.37 and 251.63 is: 377.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.91 : 1,351.37 = 251.63 : x
  2. Step 2: Convert to fraction form
    900.91/1,351.37 = 251.63/x
  3. Step 3: Cross multiply
    900.91x = 1,351.37 × 251.63
  4. Step 4: Simplify right side
    900.91x = 340,045.23
  5. Step 5: Solve for x
    x = 340,045.23/900.91
  6. Step 6: Final answer
    x = 377.45

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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.