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Finding the Fourth Proportional to 619,268.40, 929,485.80 and 383,072.40

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Solution

The fourth proportional to 619,268.40, 929,485.80 and 383,072.40 is: 574,969.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,268.40 : 929,485.80 = 383,072.40 : x
  2. Step 2: Convert to fraction form
    619,268.40/929,485.80 = 383,072.40/x
  3. Step 3: Cross multiply
    619,268.40x = 929,485.80 × 383,072.40
  4. Step 4: Simplify right side
    619,268.40x = 356,060,356,171.92
  5. Step 5: Solve for x
    x = 356,060,356,171.92/619,268.40
  6. Step 6: Final answer
    x = 574,969.36

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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.