Home / 3,785.74-5,681.21-1,320.57

Finding the Fourth Proportional to 3,785.74, 5,681.21 and 1,320.57

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Solution

The fourth proportional to 3,785.74, 5,681.21 and 1,320.57 is: 1,981.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,785.74 : 5,681.21 = 1,320.57 : x
  2. Step 2: Convert to fraction form
    3,785.74/5,681.21 = 1,320.57/x
  3. Step 3: Cross multiply
    3,785.74x = 5,681.21 × 1,320.57
  4. Step 4: Simplify right side
    3,785.74x = 7,502,428.89
  5. Step 5: Solve for x
    x = 7,502,428.89/3,785.74
  6. Step 6: Final answer
    x = 1,981.76

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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.