Home / 5,280.79-7,920.46-1,384.87

Finding the Fourth Proportional to 5,280.79, 7,920.46 and 1,384.87

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Solution

The fourth proportional to 5,280.79, 7,920.46 and 1,384.87 is: 2,077.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.79 : 7,920.46 = 1,384.87 : x
  2. Step 2: Convert to fraction form
    5,280.79/7,920.46 = 1,384.87/x
  3. Step 3: Cross multiply
    5,280.79x = 7,920.46 × 1,384.87
  4. Step 4: Simplify right side
    5,280.79x = 10,968,807.44
  5. Step 5: Solve for x
    x = 10,968,807.44/5,280.79
  6. Step 6: Final answer
    x = 2,077.11

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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.