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Finding the Fourth Proportional to 1,639.74, 2,264.69 and 1,107.70

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Solution

The fourth proportional to 1,639.74, 2,264.69 and 1,107.70 is: 1,529.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.74 : 2,264.69 = 1,107.70 : x
  2. Step 2: Convert to fraction form
    1,639.74/2,264.69 = 1,107.70/x
  3. Step 3: Cross multiply
    1,639.74x = 2,264.69 × 1,107.70
  4. Step 4: Simplify right side
    1,639.74x = 2,508,597.11
  5. Step 5: Solve for x
    x = 2,508,597.11/1,639.74
  6. Step 6: Final answer
    x = 1,529.87

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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.