Home / 1,426.64-2,128.30-1,386.95

Finding the Fourth Proportional to 1,426.64, 2,128.30 and 1,386.95

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Solution

The fourth proportional to 1,426.64, 2,128.30 and 1,386.95 is: 2,069.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.64 : 2,128.30 = 1,386.95 : x
  2. Step 2: Convert to fraction form
    1,426.64/2,128.30 = 1,386.95/x
  3. Step 3: Cross multiply
    1,426.64x = 2,128.30 × 1,386.95
  4. Step 4: Simplify right side
    1,426.64x = 2,951,831.58
  5. Step 5: Solve for x
    x = 2,951,831.58/1,426.64
  6. Step 6: Final answer
    x = 2,069.09

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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.