Home / 3,721.20-5,580-2,490

Finding the Fourth Proportional to 3,721.20, 5,580 and 2,490

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Solution

The fourth proportional to 3,721.20, 5,580 and 2,490 is: 3,733.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,721.20 : 5,580 = 2,490 : x
  2. Step 2: Convert to fraction form
    3,721.20/5,580 = 2,490/x
  3. Step 3: Cross multiply
    3,721.20x = 5,580 × 2,490
  4. Step 4: Simplify right side
    3,721.20x = 13,894,200
  5. Step 5: Solve for x
    x = 13,894,200/3,721.20
  6. Step 6: Final answer
    x = 3,733.80

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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.