Home / 1,490.40-2,236.26-517.20

Finding the Fourth Proportional to 1,490.40, 2,236.26 and 517.20

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Solution

The fourth proportional to 1,490.40, 2,236.26 and 517.20 is: 776.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490.40 : 2,236.26 = 517.20 : x
  2. Step 2: Convert to fraction form
    1,490.40/2,236.26 = 517.20/x
  3. Step 3: Cross multiply
    1,490.40x = 2,236.26 × 517.20
  4. Step 4: Simplify right side
    1,490.40x = 1,156,593.67
  5. Step 5: Solve for x
    x = 1,156,593.67/1,490.40
  6. Step 6: Final answer
    x = 776.03

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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.