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Finding the Fourth Proportional to 3,888.04, 5,831.63 and 1,388.69

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Solution

The fourth proportional to 3,888.04, 5,831.63 and 1,388.69 is: 2,082.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888.04 : 5,831.63 = 1,388.69 : x
  2. Step 2: Convert to fraction form
    3,888.04/5,831.63 = 1,388.69/x
  3. Step 3: Cross multiply
    3,888.04x = 5,831.63 × 1,388.69
  4. Step 4: Simplify right side
    3,888.04x = 8,098,314.64
  5. Step 5: Solve for x
    x = 8,098,314.64/3,888.04
  6. Step 6: Final answer
    x = 2,082.88

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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.