Home / 1,640.67-2,264.84-1,143.12

Finding the Fourth Proportional to 1,640.67, 2,264.84 and 1,143.12

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Solution

The fourth proportional to 1,640.67, 2,264.84 and 1,143.12 is: 1,578.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.67 : 2,264.84 = 1,143.12 : x
  2. Step 2: Convert to fraction form
    1,640.67/2,264.84 = 1,143.12/x
  3. Step 3: Cross multiply
    1,640.67x = 2,264.84 × 1,143.12
  4. Step 4: Simplify right side
    1,640.67x = 2,588,983.90
  5. Step 5: Solve for x
    x = 2,588,983.90/1,640.67
  6. Step 6: Final answer
    x = 1,578.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.