Home / 1,317.17-1,975.95-439.39

Finding the Fourth Proportional to 1,317.17, 1,975.95 and 439.39

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Solution

The fourth proportional to 1,317.17, 1,975.95 and 439.39 is: 659.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.17 : 1,975.95 = 439.39 : x
  2. Step 2: Convert to fraction form
    1,317.17/1,975.95 = 439.39/x
  3. Step 3: Cross multiply
    1,317.17x = 1,975.95 × 439.39
  4. Step 4: Simplify right side
    1,317.17x = 868,212.67
  5. Step 5: Solve for x
    x = 868,212.67/1,317.17
  6. Step 6: Final answer
    x = 659.15

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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.