Home / 1,335.27-2,001.90-815.15

Finding the Fourth Proportional to 1,335.27, 2,001.90 and 815.15

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Solution

The fourth proportional to 1,335.27, 2,001.90 and 815.15 is: 1,222.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.27 : 2,001.90 = 815.15 : x
  2. Step 2: Convert to fraction form
    1,335.27/2,001.90 = 815.15/x
  3. Step 3: Cross multiply
    1,335.27x = 2,001.90 × 815.15
  4. Step 4: Simplify right side
    1,335.27x = 1,631,848.79
  5. Step 5: Solve for x
    x = 1,631,848.79/1,335.27
  6. Step 6: Final answer
    x = 1,222.11

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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.