Home / 1,722.40-2,580.90-1,490.20

Finding the Fourth Proportional to 1,722.40, 2,580.90 and 1,490.20

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Solution

The fourth proportional to 1,722.40, 2,580.90 and 1,490.20 is: 2,232.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,722.40 : 2,580.90 = 1,490.20 : x
  2. Step 2: Convert to fraction form
    1,722.40/2,580.90 = 1,490.20/x
  3. Step 3: Cross multiply
    1,722.40x = 2,580.90 × 1,490.20
  4. Step 4: Simplify right side
    1,722.40x = 3,846,057.18
  5. Step 5: Solve for x
    x = 3,846,057.18/1,722.40
  6. Step 6: Final answer
    x = 2,232.96

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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.