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Finding the Fourth Proportional to 858,784.80, 1,288,212 and 219,105.12

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Solution

The fourth proportional to 858,784.80, 1,288,212 and 219,105.12 is: 328,666.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,784.80 : 1,288,212 = 219,105.12 : x
  2. Step 2: Convert to fraction form
    858,784.80/1,288,212 = 219,105.12/x
  3. Step 3: Cross multiply
    858,784.80x = 1,288,212 × 219,105.12
  4. Step 4: Simplify right side
    858,784.80x = 282,253,844,845.44
  5. Step 5: Solve for x
    x = 282,253,844,845.44/858,784.80
  6. Step 6: Final answer
    x = 328,666.56

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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.