Home / 780,990.87-1,170,148.98-426,253.80

Finding the Fourth Proportional to 780,990.87, 1,170,148.98 and 426,253.80

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Solution

The fourth proportional to 780,990.87, 1,170,148.98 and 426,253.80 is: 638,650.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,990.87 : 1,170,148.98 = 426,253.80 : x
  2. Step 2: Convert to fraction form
    780,990.87/1,170,148.98 = 426,253.80/x
  3. Step 3: Cross multiply
    780,990.87x = 1,170,148.98 × 426,253.80
  4. Step 4: Simplify right side
    780,990.87x = 498,780,449,291.12
  5. Step 5: Solve for x
    x = 498,780,449,291.12/780,990.87
  6. Step 6: Final answer
    x = 638,650.81

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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.