Home / 811,296.90-1,217,144.61-278,825.58

Finding the Fourth Proportional to 811,296.90, 1,217,144.61 and 278,825.58

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Solution

The fourth proportional to 811,296.90, 1,217,144.61 and 278,825.58 is: 418,306.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,296.90 : 1,217,144.61 = 278,825.58 : x
  2. Step 2: Convert to fraction form
    811,296.90/1,217,144.61 = 278,825.58/x
  3. Step 3: Cross multiply
    811,296.90x = 1,217,144.61 × 278,825.58
  4. Step 4: Simplify right side
    811,296.90x = 339,371,051,827.12
  5. Step 5: Solve for x
    x = 339,371,051,827.12/811,296.90
  6. Step 6: Final answer
    x = 418,306.85

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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.