Home / 3,663.19-5,491.50-1,321.57

Finding the Fourth Proportional to 3,663.19, 5,491.50 and 1,321.57

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Solution

The fourth proportional to 3,663.19, 5,491.50 and 1,321.57 is: 1,981.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,663.19 : 5,491.50 = 1,321.57 : x
  2. Step 2: Convert to fraction form
    3,663.19/5,491.50 = 1,321.57/x
  3. Step 3: Cross multiply
    3,663.19x = 5,491.50 × 1,321.57
  4. Step 4: Simplify right side
    3,663.19x = 7,257,401.66
  5. Step 5: Solve for x
    x = 7,257,401.66/3,663.19
  6. Step 6: Final answer
    x = 1,981.17

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1.5x scale

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.