Home / 1,209.64-1,667.66-1,086.62

Finding the Fourth Proportional to 1,209.64, 1,667.66 and 1,086.62

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Solution

The fourth proportional to 1,209.64, 1,667.66 and 1,086.62 is: 1,498.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209.64 : 1,667.66 = 1,086.62 : x
  2. Step 2: Convert to fraction form
    1,209.64/1,667.66 = 1,086.62/x
  3. Step 3: Cross multiply
    1,209.64x = 1,667.66 × 1,086.62
  4. Step 4: Simplify right side
    1,209.64x = 1,812,112.71
  5. Step 5: Solve for x
    x = 1,812,112.71/1,209.64
  6. Step 6: Final answer
    x = 1,498.06

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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.