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Finding the Fourth Proportional to 368,857.20, 553,285.80 and 228,889.20

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Solution

The fourth proportional to 368,857.20, 553,285.80 and 228,889.20 is: 343,333.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,857.20 : 553,285.80 = 228,889.20 : x
  2. Step 2: Convert to fraction form
    368,857.20/553,285.80 = 228,889.20/x
  3. Step 3: Cross multiply
    368,857.20x = 553,285.80 × 228,889.20
  4. Step 4: Simplify right side
    368,857.20x = 126,641,144,133.36
  5. Step 5: Solve for x
    x = 126,641,144,133.36/368,857.20
  6. Step 6: Final answer
    x = 343,333.80

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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.