Home / 1,317.71-1,976.75-439.92

Finding the Fourth Proportional to 1,317.71, 1,976.75 and 439.92

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Solution

The fourth proportional to 1,317.71, 1,976.75 and 439.92 is: 659.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.71 : 1,976.75 = 439.92 : x
  2. Step 2: Convert to fraction form
    1,317.71/1,976.75 = 439.92/x
  3. Step 3: Cross multiply
    1,317.71x = 1,976.75 × 439.92
  4. Step 4: Simplify right side
    1,317.71x = 869,611.86
  5. Step 5: Solve for x
    x = 869,611.86/1,317.71
  6. Step 6: Final answer
    x = 659.94

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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.