Home / 5,280.98-7,287.65-2,890.89

Finding the Fourth Proportional to 5,280.98, 7,287.65 and 2,890.89

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Solution

The fourth proportional to 5,280.98, 7,287.65 and 2,890.89 is: 3,989.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.98 : 7,287.65 = 2,890.89 : x
  2. Step 2: Convert to fraction form
    5,280.98/7,287.65 = 2,890.89/x
  3. Step 3: Cross multiply
    5,280.98x = 7,287.65 × 2,890.89
  4. Step 4: Simplify right side
    5,280.98x = 21,067,780.05
  5. Step 5: Solve for x
    x = 21,067,780.05/5,280.98
  6. Step 6: Final answer
    x = 3,989.37

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1.5x scale

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.