Home / 2,001.78-3,002.67-1,312.81

Finding the Fourth Proportional to 2,001.78, 3,002.67 and 1,312.81

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Solution

The fourth proportional to 2,001.78, 3,002.67 and 1,312.81 is: 1,969.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,001.78 : 3,002.67 = 1,312.81 : x
  2. Step 2: Convert to fraction form
    2,001.78/3,002.67 = 1,312.81/x
  3. Step 3: Cross multiply
    2,001.78x = 3,002.67 × 1,312.81
  4. Step 4: Simplify right side
    2,001.78x = 3,941,927.70
  5. Step 5: Solve for x
    x = 3,941,927.70/2,001.78
  6. Step 6: Final answer
    x = 1,969.21

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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.