Home / 1,639.71-2,263.14-1,587.69

Finding the Fourth Proportional to 1,639.71, 2,263.14 and 1,587.69

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Solution

The fourth proportional to 1,639.71, 2,263.14 and 1,587.69 is: 2,191.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.71 : 2,263.14 = 1,587.69 : x
  2. Step 2: Convert to fraction form
    1,639.71/2,263.14 = 1,587.69/x
  3. Step 3: Cross multiply
    1,639.71x = 2,263.14 × 1,587.69
  4. Step 4: Simplify right side
    1,639.71x = 3,593,164.75
  5. Step 5: Solve for x
    x = 3,593,164.75/1,639.71
  6. Step 6: Final answer
    x = 2,191.34

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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.