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Finding the Fourth Proportional to 879,253.35, 1,318,855.31 and 280,250.40

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Solution

The fourth proportional to 879,253.35, 1,318,855.31 and 280,250.40 is: 420,367.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,253.35 : 1,318,855.31 = 280,250.40 : x
  2. Step 2: Convert to fraction form
    879,253.35/1,318,855.31 = 280,250.40/x
  3. Step 3: Cross multiply
    879,253.35x = 1,318,855.31 × 280,250.40
  4. Step 4: Simplify right side
    879,253.35x = 369,609,726,768.37
  5. Step 5: Solve for x
    x = 369,609,726,768.37/879,253.35
  6. Step 6: Final answer
    x = 420,367.72

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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.