Home / 811,374.20-1,217,061.30-278,847.80

Finding the Fourth Proportional to 811,374.20, 1,217,061.30 and 278,847.80

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Solution

The fourth proportional to 811,374.20, 1,217,061.30 and 278,847.80 is: 418,271.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,374.20 : 1,217,061.30 = 278,847.80 : x
  2. Step 2: Convert to fraction form
    811,374.20/1,217,061.30 = 278,847.80/x
  3. Step 3: Cross multiply
    811,374.20x = 1,217,061.30 × 278,847.80
  4. Step 4: Simplify right side
    811,374.20x = 339,374,865,970.14
  5. Step 5: Solve for x
    x = 339,374,865,970.14/811,374.20
  6. Step 6: Final answer
    x = 418,271.70

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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.