Home / 1,328.40-1,983.78-1,146.24

Finding the Fourth Proportional to 1,328.40, 1,983.78 and 1,146.24

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Solution

The fourth proportional to 1,328.40, 1,983.78 and 1,146.24 is: 1,711.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.40 : 1,983.78 = 1,146.24 : x
  2. Step 2: Convert to fraction form
    1,328.40/1,983.78 = 1,146.24/x
  3. Step 3: Cross multiply
    1,328.40x = 1,983.78 × 1,146.24
  4. Step 4: Simplify right side
    1,328.40x = 2,273,887.99
  5. Step 5: Solve for x
    x = 2,273,887.99/1,328.40
  6. Step 6: Final answer
    x = 1,711.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.