Home / 1,317.47-1,976.20-343.56

Finding the Fourth Proportional to 1,317.47, 1,976.20 and 343.56

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Solution

The fourth proportional to 1,317.47, 1,976.20 and 343.56 is: 515.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.47 : 1,976.20 = 343.56 : x
  2. Step 2: Convert to fraction form
    1,317.47/1,976.20 = 343.56/x
  3. Step 3: Cross multiply
    1,317.47x = 1,976.20 × 343.56
  4. Step 4: Simplify right side
    1,317.47x = 678,938.71
  5. Step 5: Solve for x
    x = 678,938.71/1,317.47
  6. Step 6: Final answer
    x = 515.34

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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.