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Finding the Fourth Proportional to 2,068.11, 3,101.55 and 751.70

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Solution

The fourth proportional to 2,068.11, 3,101.55 and 751.70 is: 1,127.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,068.11 : 3,101.55 = 751.70 : x
  2. Step 2: Convert to fraction form
    2,068.11/3,101.55 = 751.70/x
  3. Step 3: Cross multiply
    2,068.11x = 3,101.55 × 751.70
  4. Step 4: Simplify right side
    2,068.11x = 2,331,419.63
  5. Step 5: Solve for x
    x = 2,331,419.63/2,068.11
  6. Step 6: Final answer
    x = 1,127.32

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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.