Home / 1,511.97-2,086.64-839.84

Finding the Fourth Proportional to 1,511.97, 2,086.64 and 839.84

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Solution

The fourth proportional to 1,511.97, 2,086.64 and 839.84 is: 1,159.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.97 : 2,086.64 = 839.84 : x
  2. Step 2: Convert to fraction form
    1,511.97/2,086.64 = 839.84/x
  3. Step 3: Cross multiply
    1,511.97x = 2,086.64 × 839.84
  4. Step 4: Simplify right side
    1,511.97x = 1,752,443.74
  5. Step 5: Solve for x
    x = 1,752,443.74/1,511.97
  6. Step 6: Final answer
    x = 1,159.05

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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.