Home / 1,207.83-1,811.70-386.08

Finding the Fourth Proportional to 1,207.83, 1,811.70 and 386.08

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Solution

The fourth proportional to 1,207.83, 1,811.70 and 386.08 is: 579.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.83 : 1,811.70 = 386.08 : x
  2. Step 2: Convert to fraction form
    1,207.83/1,811.70 = 386.08/x
  3. Step 3: Cross multiply
    1,207.83x = 1,811.70 × 386.08
  4. Step 4: Simplify right side
    1,207.83x = 699,461.14
  5. Step 5: Solve for x
    x = 699,461.14/1,207.83
  6. Step 6: Final answer
    x = 579.11

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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.