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Finding the Fourth Proportional to 391,390.40, 586,696.80 and 180,660.80

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Solution

The fourth proportional to 391,390.40, 586,696.80 and 180,660.80 is: 270,811.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,390.40 : 586,696.80 = 180,660.80 : x
  2. Step 2: Convert to fraction form
    391,390.40/586,696.80 = 180,660.80/x
  3. Step 3: Cross multiply
    391,390.40x = 586,696.80 × 180,660.80
  4. Step 4: Simplify right side
    391,390.40x = 105,993,113,245.44
  5. Step 5: Solve for x
    x = 105,993,113,245.44/391,390.40
  6. Step 6: Final answer
    x = 270,811.73

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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.