Home / 1,317.12-1,976.81-537.55

Finding the Fourth Proportional to 1,317.12, 1,976.81 and 537.55

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Solution

The fourth proportional to 1,317.12, 1,976.81 and 537.55 is: 806.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.12 : 1,976.81 = 537.55 : x
  2. Step 2: Convert to fraction form
    1,317.12/1,976.81 = 537.55/x
  3. Step 3: Cross multiply
    1,317.12x = 1,976.81 × 537.55
  4. Step 4: Simplify right side
    1,317.12x = 1,062,621.64
  5. Step 5: Solve for x
    x = 1,062,621.64/1,317.12
  6. Step 6: Final answer
    x = 806.78

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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.