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Finding the Fourth Proportional to 3,951.84, 5,437.80 and 3,831.60

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Solution

The fourth proportional to 3,951.84, 5,437.80 and 3,831.60 is: 5,272.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,951.84 : 5,437.80 = 3,831.60 : x
  2. Step 2: Convert to fraction form
    3,951.84/5,437.80 = 3,831.60/x
  3. Step 3: Cross multiply
    3,951.84x = 5,437.80 × 3,831.60
  4. Step 4: Simplify right side
    3,951.84x = 20,835,474.48
  5. Step 5: Solve for x
    x = 20,835,474.48/3,951.84
  6. Step 6: Final answer
    x = 5,272.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.