Home / 858,821.20-1,288,231.80-815,518.60

Finding the Fourth Proportional to 858,821.20, 1,288,231.80 and 815,518.60

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Solution

The fourth proportional to 858,821.20, 1,288,231.80 and 815,518.60 is: 1,223,277.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,821.20 : 1,288,231.80 = 815,518.60 : x
  2. Step 2: Convert to fraction form
    858,821.20/1,288,231.80 = 815,518.60/x
  3. Step 3: Cross multiply
    858,821.20x = 1,288,231.80 × 815,518.60
  4. Step 4: Simplify right side
    858,821.20x = 1,050,576,994,011.48
  5. Step 5: Solve for x
    x = 1,050,576,994,011.48/858,821.20
  6. Step 6: Final answer
    x = 1,223,277.90

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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.