Home / 1,206.14-1,809.45-686.39

Finding the Fourth Proportional to 1,206.14, 1,809.45 and 686.39

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Solution

The fourth proportional to 1,206.14, 1,809.45 and 686.39 is: 1,029.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.14 : 1,809.45 = 686.39 : x
  2. Step 2: Convert to fraction form
    1,206.14/1,809.45 = 686.39/x
  3. Step 3: Cross multiply
    1,206.14x = 1,809.45 × 686.39
  4. Step 4: Simplify right side
    1,206.14x = 1,241,979.34
  5. Step 5: Solve for x
    x = 1,241,979.34/1,206.14
  6. Step 6: Final answer
    x = 1,029.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.