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Finding the Fourth Proportional to 900.61, 1,350.80 and 251.39

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Solution

The fourth proportional to 900.61, 1,350.80 and 251.39 is: 377.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.61 : 1,350.80 = 251.39 : x
  2. Step 2: Convert to fraction form
    900.61/1,350.80 = 251.39/x
  3. Step 3: Cross multiply
    900.61x = 1,350.80 × 251.39
  4. Step 4: Simplify right side
    900.61x = 339,576.36
  5. Step 5: Solve for x
    x = 339,576.36/900.61
  6. Step 6: Final answer
    x = 377.05

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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.