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Finding the Fourth Proportional to 3,863.60, 5,792.88 and 1,888.40

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Solution

The fourth proportional to 3,863.60, 5,792.88 and 1,888.40 is: 2,831.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,863.60 : 5,792.88 = 1,888.40 : x
  2. Step 2: Convert to fraction form
    3,863.60/5,792.88 = 1,888.40/x
  3. Step 3: Cross multiply
    3,863.60x = 5,792.88 × 1,888.40
  4. Step 4: Simplify right side
    3,863.60x = 10,939,274.59
  5. Step 5: Solve for x
    x = 10,939,274.59/3,863.60
  6. Step 6: Final answer
    x = 2,831.37

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1.5x scale

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.