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Finding the Fourth Proportional to 2,077.13, 3,115.26 and 761.51

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Solution

The fourth proportional to 2,077.13, 3,115.26 and 761.51 is: 1,142.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,077.13 : 3,115.26 = 761.51 : x
  2. Step 2: Convert to fraction form
    2,077.13/3,115.26 = 761.51/x
  3. Step 3: Cross multiply
    2,077.13x = 3,115.26 × 761.51
  4. Step 4: Simplify right side
    2,077.13x = 2,372,301.64
  5. Step 5: Solve for x
    x = 2,372,301.64/2,077.13
  6. Step 6: Final answer
    x = 1,142.11

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1.5x scale

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.