Home / 5,785.78-8,678.40-2,320.60

Finding the Fourth Proportional to 5,785.78, 8,678.40 and 2,320.60

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Solution

The fourth proportional to 5,785.78, 8,678.40 and 2,320.60 is: 3,480.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,785.78 : 8,678.40 = 2,320.60 : x
  2. Step 2: Convert to fraction form
    5,785.78/8,678.40 = 2,320.60/x
  3. Step 3: Cross multiply
    5,785.78x = 8,678.40 × 2,320.60
  4. Step 4: Simplify right side
    5,785.78x = 20,139,095.04
  5. Step 5: Solve for x
    x = 20,139,095.04/5,785.78
  6. Step 6: Final answer
    x = 3,480.79

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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.