Home / 858,799.40-1,288,199.10-620,853.80

Finding the Fourth Proportional to 858,799.40, 1,288,199.10 and 620,853.80

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Solution

The fourth proportional to 858,799.40, 1,288,199.10 and 620,853.80 is: 931,280.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,799.40 : 1,288,199.10 = 620,853.80 : x
  2. Step 2: Convert to fraction form
    858,799.40/1,288,199.10 = 620,853.80/x
  3. Step 3: Cross multiply
    858,799.40x = 1,288,199.10 × 620,853.80
  4. Step 4: Simplify right side
    858,799.40x = 799,783,306,391.58
  5. Step 5: Solve for x
    x = 799,783,306,391.58/858,799.40
  6. Step 6: Final answer
    x = 931,280.70

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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.