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Finding the Fourth Proportional to 1,101.07, 1,651.59 and 331.57

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Solution

The fourth proportional to 1,101.07, 1,651.59 and 331.57 is: 497.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.07 : 1,651.59 = 331.57 : x
  2. Step 2: Convert to fraction form
    1,101.07/1,651.59 = 331.57/x
  3. Step 3: Cross multiply
    1,101.07x = 1,651.59 × 331.57
  4. Step 4: Simplify right side
    1,101.07x = 547,617.70
  5. Step 5: Solve for x
    x = 547,617.70/1,101.07
  6. Step 6: Final answer
    x = 497.35

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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.