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Finding the Fourth Proportional to 383,990.40, 575,985.60 and 338,889.60

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Solution

The fourth proportional to 383,990.40, 575,985.60 and 338,889.60 is: 508,334.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,990.40 : 575,985.60 = 338,889.60 : x
  2. Step 2: Convert to fraction form
    383,990.40/575,985.60 = 338,889.60/x
  3. Step 3: Cross multiply
    383,990.40x = 575,985.60 × 338,889.60
  4. Step 4: Simplify right side
    383,990.40x = 195,195,529,589.76
  5. Step 5: Solve for x
    x = 195,195,529,589.76/383,990.40
  6. Step 6: Final answer
    x = 508,334.40

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Similar ratio
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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.