Home / 3,890.10-5,831.64-1,423.20

Finding the Fourth Proportional to 3,890.10, 5,831.64 and 1,423.20

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Solution

The fourth proportional to 3,890.10, 5,831.64 and 1,423.20 is: 2,133.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.10 : 5,831.64 = 1,423.20 : x
  2. Step 2: Convert to fraction form
    3,890.10/5,831.64 = 1,423.20/x
  3. Step 3: Cross multiply
    3,890.10x = 5,831.64 × 1,423.20
  4. Step 4: Simplify right side
    3,890.10x = 8,299,590.05
  5. Step 5: Solve for x
    x = 8,299,590.05/3,890.10
  6. Step 6: Final answer
    x = 2,133.52

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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.