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Finding the Fourth Proportional to 398,640.20, 597,960.30 and 368,227.40

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Solution

The fourth proportional to 398,640.20, 597,960.30 and 368,227.40 is: 552,341.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,640.20 : 597,960.30 = 368,227.40 : x
  2. Step 2: Convert to fraction form
    398,640.20/597,960.30 = 368,227.40/x
  3. Step 3: Cross multiply
    398,640.20x = 597,960.30 × 368,227.40
  4. Step 4: Simplify right side
    398,640.20x = 220,185,366,572.22
  5. Step 5: Solve for x
    x = 220,185,366,572.22/398,640.20
  6. Step 6: Final answer
    x = 552,341.10

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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.