Home / 1,207.78-1,811.68-630.52

Finding the Fourth Proportional to 1,207.78, 1,811.68 and 630.52

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Solution

The fourth proportional to 1,207.78, 1,811.68 and 630.52 is: 945.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.78 : 1,811.68 = 630.52 : x
  2. Step 2: Convert to fraction form
    1,207.78/1,811.68 = 630.52/x
  3. Step 3: Cross multiply
    1,207.78x = 1,811.68 × 630.52
  4. Step 4: Simplify right side
    1,207.78x = 1,142,300.47
  5. Step 5: Solve for x
    x = 1,142,300.47/1,207.78
  6. Step 6: Final answer
    x = 945.79

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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.