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Finding the Fourth Proportional to 455,998.80, 682,961.40 and 288,037.20

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Solution

The fourth proportional to 455,998.80, 682,961.40 and 288,037.20 is: 431,400.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,998.80 : 682,961.40 = 288,037.20 : x
  2. Step 2: Convert to fraction form
    455,998.80/682,961.40 = 288,037.20/x
  3. Step 3: Cross multiply
    455,998.80x = 682,961.40 × 288,037.20
  4. Step 4: Simplify right side
    455,998.80x = 196,718,289,364.08
  5. Step 5: Solve for x
    x = 196,718,289,364.08/455,998.80
  6. Step 6: Final answer
    x = 431,400.89

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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.