Home / 1,305.16-1,795.66-1,139.76

Finding the Fourth Proportional to 1,305.16, 1,795.66 and 1,139.76

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Solution

The fourth proportional to 1,305.16, 1,795.66 and 1,139.76 is: 1,568.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,305.16 : 1,795.66 = 1,139.76 : x
  2. Step 2: Convert to fraction form
    1,305.16/1,795.66 = 1,139.76/x
  3. Step 3: Cross multiply
    1,305.16x = 1,795.66 × 1,139.76
  4. Step 4: Simplify right side
    1,305.16x = 2,046,621.44
  5. Step 5: Solve for x
    x = 2,046,621.44/1,305.16
  6. Step 6: Final answer
    x = 1,568.10

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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.