Home / 3,121.50-4,307.67-1,724.52

Finding the Fourth Proportional to 3,121.50, 4,307.67 and 1,724.52

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Solution

The fourth proportional to 3,121.50, 4,307.67 and 1,724.52 is: 2,379.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.50 : 4,307.67 = 1,724.52 : x
  2. Step 2: Convert to fraction form
    3,121.50/4,307.67 = 1,724.52/x
  3. Step 3: Cross multiply
    3,121.50x = 4,307.67 × 1,724.52
  4. Step 4: Simplify right side
    3,121.50x = 7,428,663.07
  5. Step 5: Solve for x
    x = 7,428,663.07/3,121.50
  6. Step 6: Final answer
    x = 2,379.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.