Home / 5,280.31-7,920.46-1,384.71

Finding the Fourth Proportional to 5,280.31, 7,920.46 and 1,384.71

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Solution

The fourth proportional to 5,280.31, 7,920.46 and 1,384.71 is: 2,077.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.31 : 7,920.46 = 1,384.71 : x
  2. Step 2: Convert to fraction form
    5,280.31/7,920.46 = 1,384.71/x
  3. Step 3: Cross multiply
    5,280.31x = 7,920.46 × 1,384.71
  4. Step 4: Simplify right side
    5,280.31x = 10,967,536.70
  5. Step 5: Solve for x
    x = 10,967,536.70/5,280.31
  6. Step 6: Final answer
    x = 2,077.06

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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.