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Finding the Fourth Proportional to 368,900.80, 553,351.20 and 228,932.80

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Solution

The fourth proportional to 368,900.80, 553,351.20 and 228,932.80 is: 343,399.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,900.80 : 553,351.20 = 228,932.80 : x
  2. Step 2: Convert to fraction form
    368,900.80/553,351.20 = 228,932.80/x
  3. Step 3: Cross multiply
    368,900.80x = 553,351.20 × 228,932.80
  4. Step 4: Simplify right side
    368,900.80x = 126,680,239,599.36
  5. Step 5: Solve for x
    x = 126,680,239,599.36/368,900.80
  6. Step 6: Final answer
    x = 343,399.20

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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.