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Finding the Fourth Proportional to 1,131.90, 1,562.02 and 634.54

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Solution

The fourth proportional to 1,131.90, 1,562.02 and 634.54 is: 875.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.90 : 1,562.02 = 634.54 : x
  2. Step 2: Convert to fraction form
    1,131.90/1,562.02 = 634.54/x
  3. Step 3: Cross multiply
    1,131.90x = 1,562.02 × 634.54
  4. Step 4: Simplify right side
    1,131.90x = 991,167.95
  5. Step 5: Solve for x
    x = 991,167.95/1,131.90
  6. Step 6: Final answer
    x = 875.67

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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.