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Finding the Fourth Proportional to 377,679.60, 566,519.40 and 128,361.60

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Solution

The fourth proportional to 377,679.60, 566,519.40 and 128,361.60 is: 192,542.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    377,679.60 : 566,519.40 = 128,361.60 : x
  2. Step 2: Convert to fraction form
    377,679.60/566,519.40 = 128,361.60/x
  3. Step 3: Cross multiply
    377,679.60x = 566,519.40 × 128,361.60
  4. Step 4: Simplify right side
    377,679.60x = 72,719,336,615.04
  5. Step 5: Solve for x
    x = 72,719,336,615.04/377,679.60
  6. Step 6: Final answer
    x = 192,542.40

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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.