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Finding the Fourth Proportional to 353,018.57, 529,361.53 and 128,220.48

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Solution

The fourth proportional to 353,018.57, 529,361.53 and 128,220.48 is: 192,270.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,018.57 : 529,361.53 = 128,220.48 : x
  2. Step 2: Convert to fraction form
    353,018.57/529,361.53 = 128,220.48/x
  3. Step 3: Cross multiply
    353,018.57x = 529,361.53 × 128,220.48
  4. Step 4: Simplify right side
    353,018.57x = 67,874,989,149.58
  5. Step 5: Solve for x
    x = 67,874,989,149.58/353,018.57
  6. Step 6: Final answer
    x = 192,270.31

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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.