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Finding the Fourth Proportional to 1,299.66, 1,788.08 and 1,134.26

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Solution

The fourth proportional to 1,299.66, 1,788.08 and 1,134.26 is: 1,560.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299.66 : 1,788.08 = 1,134.26 : x
  2. Step 2: Convert to fraction form
    1,299.66/1,788.08 = 1,134.26/x
  3. Step 3: Cross multiply
    1,299.66x = 1,788.08 × 1,134.26
  4. Step 4: Simplify right side
    1,299.66x = 2,028,133.01
  5. Step 5: Solve for x
    x = 2,028,133.01/1,299.66
  6. Step 6: Final answer
    x = 1,560.51

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1.5x scale

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.