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Finding the Fourth Proportional to 368,989.80, 553,614.30 and 132,340.20

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Solution

The fourth proportional to 368,989.80, 553,614.30 and 132,340.20 is: 198,556.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,989.80 : 553,614.30 = 132,340.20 : x
  2. Step 2: Convert to fraction form
    368,989.80/553,614.30 = 132,340.20/x
  3. Step 3: Cross multiply
    368,989.80x = 553,614.30 × 132,340.20
  4. Step 4: Simplify right side
    368,989.80x = 73,265,427,184.86
  5. Step 5: Solve for x
    x = 73,265,427,184.86/368,989.80
  6. Step 6: Final answer
    x = 198,556.78

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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.