Home / 811,307.60-1,216,846.20-278,853.20

Finding the Fourth Proportional to 811,307.60, 1,216,846.20 and 278,853.20

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Solution

The fourth proportional to 811,307.60, 1,216,846.20 and 278,853.20 is: 418,240.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,307.60 : 1,216,846.20 = 278,853.20 : x
  2. Step 2: Convert to fraction form
    811,307.60/1,216,846.20 = 278,853.20/x
  3. Step 3: Cross multiply
    811,307.60x = 1,216,846.20 × 278,853.20
  4. Step 4: Simplify right side
    811,307.60x = 339,321,456,777.84
  5. Step 5: Solve for x
    x = 339,321,456,777.84/811,307.60
  6. Step 6: Final answer
    x = 418,240.20

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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.