Home / 1,207.76-1,811.64-386.11

Finding the Fourth Proportional to 1,207.76, 1,811.64 and 386.11

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Solution

The fourth proportional to 1,207.76, 1,811.64 and 386.11 is: 579.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.76 : 1,811.64 = 386.11 : x
  2. Step 2: Convert to fraction form
    1,207.76/1,811.64 = 386.11/x
  3. Step 3: Cross multiply
    1,207.76x = 1,811.64 × 386.11
  4. Step 4: Simplify right side
    1,207.76x = 699,492.32
  5. Step 5: Solve for x
    x = 699,492.32/1,207.76
  6. Step 6: Final answer
    x = 579.17

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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.