Home / 858,764.87-1,288,146.23-326,158.55

Finding the Fourth Proportional to 858,764.87, 1,288,146.23 and 326,158.55

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Solution

The fourth proportional to 858,764.87, 1,288,146.23 and 326,158.55 is: 489,237.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,764.87 : 1,288,146.23 = 326,158.55 : x
  2. Step 2: Convert to fraction form
    858,764.87/1,288,146.23 = 326,158.55/x
  3. Step 3: Cross multiply
    858,764.87x = 1,288,146.23 × 326,158.55
  4. Step 4: Simplify right side
    858,764.87x = 420,139,904,933.97
  5. Step 5: Solve for x
    x = 420,139,904,933.97/858,764.87
  6. Step 6: Final answer
    x = 489,237.41

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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.