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Finding the Fourth Proportional to 620,387.28, 929,989.44 and 199,367.28

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Solution

The fourth proportional to 620,387.28, 929,989.44 and 199,367.28 is: 298,860.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,387.28 : 929,989.44 = 199,367.28 : x
  2. Step 2: Convert to fraction form
    620,387.28/929,989.44 = 199,367.28/x
  3. Step 3: Cross multiply
    620,387.28x = 929,989.44 × 199,367.28
  4. Step 4: Simplify right side
    620,387.28x = 185,409,465,081.52
  5. Step 5: Solve for x
    x = 185,409,465,081.52/620,387.28
  6. Step 6: Final answer
    x = 298,860.84

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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.