Home / 1,317.68-1,977.72-587.12

Finding the Fourth Proportional to 1,317.68, 1,977.72 and 587.12

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Solution

The fourth proportional to 1,317.68, 1,977.72 and 587.12 is: 881.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.68 : 1,977.72 = 587.12 : x
  2. Step 2: Convert to fraction form
    1,317.68/1,977.72 = 587.12/x
  3. Step 3: Cross multiply
    1,317.68x = 1,977.72 × 587.12
  4. Step 4: Simplify right side
    1,317.68x = 1,161,158.97
  5. Step 5: Solve for x
    x = 1,161,158.97/1,317.68
  6. Step 6: Final answer
    x = 881.21

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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.