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Finding the Fourth Proportional to 3,779.84, 5,671.28 and 1,831.84

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Solution

The fourth proportional to 3,779.84, 5,671.28 and 1,831.84 is: 2,748.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,779.84 : 5,671.28 = 1,831.84 : x
  2. Step 2: Convert to fraction form
    3,779.84/5,671.28 = 1,831.84/x
  3. Step 3: Cross multiply
    3,779.84x = 5,671.28 × 1,831.84
  4. Step 4: Simplify right side
    3,779.84x = 10,388,877.56
  5. Step 5: Solve for x
    x = 10,388,877.56/3,779.84
  6. Step 6: Final answer
    x = 2,748.50

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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.