Home / 1,317.18-1,975.76-343.42

Finding the Fourth Proportional to 1,317.18, 1,975.76 and 343.42

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Solution

The fourth proportional to 1,317.18, 1,975.76 and 343.42 is: 515.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.18 : 1,975.76 = 343.42 : x
  2. Step 2: Convert to fraction form
    1,317.18/1,975.76 = 343.42/x
  3. Step 3: Cross multiply
    1,317.18x = 1,975.76 × 343.42
  4. Step 4: Simplify right side
    1,317.18x = 678,515.50
  5. Step 5: Solve for x
    x = 678,515.50/1,317.18
  6. Step 6: Final answer
    x = 515.13

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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.