Home / 1,207.62-1,811.05-385.70

Finding the Fourth Proportional to 1,207.62, 1,811.05 and 385.70

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Solution

The fourth proportional to 1,207.62, 1,811.05 and 385.70 is: 578.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.62 : 1,811.05 = 385.70 : x
  2. Step 2: Convert to fraction form
    1,207.62/1,811.05 = 385.70/x
  3. Step 3: Cross multiply
    1,207.62x = 1,811.05 × 385.70
  4. Step 4: Simplify right side
    1,207.62x = 698,519.06
  5. Step 5: Solve for x
    x = 698,519.06/1,207.62
  6. Step 6: Final answer
    x = 578.43

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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.