Home / 1,639.84-2,260.20-1,143.40

Finding the Fourth Proportional to 1,639.84, 2,260.20 and 1,143.40

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Solution

The fourth proportional to 1,639.84, 2,260.20 and 1,143.40 is: 1,575.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.84 : 2,260.20 = 1,143.40 : x
  2. Step 2: Convert to fraction form
    1,639.84/2,260.20 = 1,143.40/x
  3. Step 3: Cross multiply
    1,639.84x = 2,260.20 × 1,143.40
  4. Step 4: Simplify right side
    1,639.84x = 2,584,312.68
  5. Step 5: Solve for x
    x = 2,584,312.68/1,639.84
  6. Step 6: Final answer
    x = 1,575.95

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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.