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Finding the Fourth Proportional to 368,889.60, 553,334.40 and 211,425.60

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Solution

The fourth proportional to 368,889.60, 553,334.40 and 211,425.60 is: 317,138.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,889.60 : 553,334.40 = 211,425.60 : x
  2. Step 2: Convert to fraction form
    368,889.60/553,334.40 = 211,425.60/x
  3. Step 3: Cross multiply
    368,889.60x = 553,334.40 × 211,425.60
  4. Step 4: Simplify right side
    368,889.60x = 116,989,057,520.64
  5. Step 5: Solve for x
    x = 116,989,057,520.64/368,889.60
  6. Step 6: Final answer
    x = 317,138.40

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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.