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Finding the Fourth Proportional to 879,216.10, 1,318,809.84 and 280,169.17

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Solution

The fourth proportional to 879,216.10, 1,318,809.84 and 280,169.17 is: 420,249.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,216.10 : 1,318,809.84 = 280,169.17 : x
  2. Step 2: Convert to fraction form
    879,216.10/1,318,809.84 = 280,169.17/x
  3. Step 3: Cross multiply
    879,216.10x = 1,318,809.84 × 280,169.17
  4. Step 4: Simplify right side
    879,216.10x = 369,489,858,260.63
  5. Step 5: Solve for x
    x = 369,489,858,260.63/879,216.10
  6. Step 6: Final answer
    x = 420,249.20

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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.