Home / 858,771.40-1,288,157.10-620,825.80

Finding the Fourth Proportional to 858,771.40, 1,288,157.10 and 620,825.80

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Solution

The fourth proportional to 858,771.40, 1,288,157.10 and 620,825.80 is: 931,238.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,771.40 : 1,288,157.10 = 620,825.80 : x
  2. Step 2: Convert to fraction form
    858,771.40/1,288,157.10 = 620,825.80/x
  3. Step 3: Cross multiply
    858,771.40x = 1,288,157.10 × 620,825.80
  4. Step 4: Simplify right side
    858,771.40x = 799,721,162,133.18
  5. Step 5: Solve for x
    x = 799,721,162,133.18/858,771.40
  6. Step 6: Final answer
    x = 931,238.70

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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.