Home / 420,320.60-629,444.10-279,315.80

Finding the Fourth Proportional to 420,320.60, 629,444.10 and 279,315.80

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Solution

The fourth proportional to 420,320.60, 629,444.10 and 279,315.80 is: 418,284.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,320.60 : 629,444.10 = 279,315.80 : x
  2. Step 2: Convert to fraction form
    420,320.60/629,444.10 = 279,315.80/x
  3. Step 3: Cross multiply
    420,320.60x = 629,444.10 × 279,315.80
  4. Step 4: Simplify right side
    420,320.60x = 175,813,682,346.78
  5. Step 5: Solve for x
    x = 175,813,682,346.78/420,320.60
  6. Step 6: Final answer
    x = 418,284.71

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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.