Home / 813,923.80-1,220,540.10-393,328.60

Finding the Fourth Proportional to 813,923.80, 1,220,540.10 and 393,328.60

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Solution

The fourth proportional to 813,923.80, 1,220,540.10 and 393,328.60 is: 589,825.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,923.80 : 1,220,540.10 = 393,328.60 : x
  2. Step 2: Convert to fraction form
    813,923.80/1,220,540.10 = 393,328.60/x
  3. Step 3: Cross multiply
    813,923.80x = 1,220,540.10 × 393,328.60
  4. Step 4: Simplify right side
    813,923.80x = 480,073,328,776.86
  5. Step 5: Solve for x
    x = 480,073,328,776.86/813,923.80
  6. Step 6: Final answer
    x = 589,825.89

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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.