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Finding the Fourth Proportional to 665,072.40, 997,025.40 and 398,938.80

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Solution

The fourth proportional to 665,072.40, 997,025.40 and 398,938.80 is: 598,058.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,072.40 : 997,025.40 = 398,938.80 : x
  2. Step 2: Convert to fraction form
    665,072.40/997,025.40 = 398,938.80/x
  3. Step 3: Cross multiply
    665,072.40x = 997,025.40 × 398,938.80
  4. Step 4: Simplify right side
    665,072.40x = 397,752,116,645.52
  5. Step 5: Solve for x
    x = 397,752,116,645.52/665,072.40
  6. Step 6: Final answer
    x = 598,058.37

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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.