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Finding the Fourth Proportional to 879,268.34, 1,318,213.49 and 347,187.65

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Solution

The fourth proportional to 879,268.34, 1,318,213.49 and 347,187.65 is: 520,509.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,268.34 : 1,318,213.49 = 347,187.65 : x
  2. Step 2: Convert to fraction form
    879,268.34/1,318,213.49 = 347,187.65/x
  3. Step 3: Cross multiply
    879,268.34x = 1,318,213.49 × 347,187.65
  4. Step 4: Simplify right side
    879,268.34x = 457,667,435,464.39
  5. Step 5: Solve for x
    x = 457,667,435,464.39/879,268.34
  6. Step 6: Final answer
    x = 520,509.40

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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.