Home / 1,215.33-1,823.60-521.80

Finding the Fourth Proportional to 1,215.33, 1,823.60 and 521.80

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Solution

The fourth proportional to 1,215.33, 1,823.60 and 521.80 is: 782.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.33 : 1,823.60 = 521.80 : x
  2. Step 2: Convert to fraction form
    1,215.33/1,823.60 = 521.80/x
  3. Step 3: Cross multiply
    1,215.33x = 1,823.60 × 521.80
  4. Step 4: Simplify right side
    1,215.33x = 951,554.48
  5. Step 5: Solve for x
    x = 951,554.48/1,215.33
  6. Step 6: Final answer
    x = 782.96

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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.