Home / 5,280.98-7,921.86-1,385.38

Finding the Fourth Proportional to 5,280.98, 7,921.86 and 1,385.38

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Solution

The fourth proportional to 5,280.98, 7,921.86 and 1,385.38 is: 2,078.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.98 : 7,921.86 = 1,385.38 : x
  2. Step 2: Convert to fraction form
    5,280.98/7,921.86 = 1,385.38/x
  3. Step 3: Cross multiply
    5,280.98x = 7,921.86 × 1,385.38
  4. Step 4: Simplify right side
    5,280.98x = 10,974,786.41
  5. Step 5: Solve for x
    x = 10,974,786.41/5,280.98
  6. Step 6: Final answer
    x = 2,078.17

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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.