Home / 3,780.81-5,672.13-1,315.28

Finding the Fourth Proportional to 3,780.81, 5,672.13 and 1,315.28

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Solution

The fourth proportional to 3,780.81, 5,672.13 and 1,315.28 is: 1,973.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,780.81 : 5,672.13 = 1,315.28 : x
  2. Step 2: Convert to fraction form
    3,780.81/5,672.13 = 1,315.28/x
  3. Step 3: Cross multiply
    3,780.81x = 5,672.13 × 1,315.28
  4. Step 4: Simplify right side
    3,780.81x = 7,460,439.15
  5. Step 5: Solve for x
    x = 7,460,439.15/3,780.81
  6. Step 6: Final answer
    x = 1,973.24

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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.