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Finding the Fourth Proportional to 343,463.40, 515,243.70 and 106,781.40

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Solution

The fourth proportional to 343,463.40, 515,243.70 and 106,781.40 is: 160,187.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,463.40 : 515,243.70 = 106,781.40 : x
  2. Step 2: Convert to fraction form
    343,463.40/515,243.70 = 106,781.40/x
  3. Step 3: Cross multiply
    343,463.40x = 515,243.70 × 106,781.40
  4. Step 4: Simplify right side
    343,463.40x = 55,018,443,627.18
  5. Step 5: Solve for x
    x = 55,018,443,627.18/343,463.40
  6. Step 6: Final answer
    x = 160,187.21

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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.