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Finding the Fourth Proportional to 389,469.40, 584,204.10 and 140,061.40

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Solution

The fourth proportional to 389,469.40, 584,204.10 and 140,061.40 is: 210,092.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,469.40 : 584,204.10 = 140,061.40 : x
  2. Step 2: Convert to fraction form
    389,469.40/584,204.10 = 140,061.40/x
  3. Step 3: Cross multiply
    389,469.40x = 584,204.10 × 140,061.40
  4. Step 4: Simplify right side
    389,469.40x = 81,824,444,131.74
  5. Step 5: Solve for x
    x = 81,824,444,131.74/389,469.40
  6. Step 6: Final answer
    x = 210,092.10

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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.