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Finding the Fourth Proportional to 1,351, 2,010.84 and 1,320.76

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Solution

The fourth proportional to 1,351, 2,010.84 and 1,320.76 is: 1,965.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351 : 2,010.84 = 1,320.76 : x
  2. Step 2: Convert to fraction form
    1,351/2,010.84 = 1,320.76/x
  3. Step 3: Cross multiply
    1,351x = 2,010.84 × 1,320.76
  4. Step 4: Simplify right side
    1,351x = 2,655,837.04
  5. Step 5: Solve for x
    x = 2,655,837.04/1,351
  6. Step 6: Final answer
    x = 1,965.83

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.