Home / 1,501.11-2,251.71-720.99

Finding the Fourth Proportional to 1,501.11, 2,251.71 and 720.99

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Solution

The fourth proportional to 1,501.11, 2,251.71 and 720.99 is: 1,081.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,501.11 : 2,251.71 = 720.99 : x
  2. Step 2: Convert to fraction form
    1,501.11/2,251.71 = 720.99/x
  3. Step 3: Cross multiply
    1,501.11x = 2,251.71 × 720.99
  4. Step 4: Simplify right side
    1,501.11x = 1,623,460.39
  5. Step 5: Solve for x
    x = 1,623,460.39/1,501.11
  6. Step 6: Final answer
    x = 1,081.51

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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.