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Finding the Fourth Proportional to 362,128.30, 543,192.45 and 212,440.30

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Solution

The fourth proportional to 362,128.30, 543,192.45 and 212,440.30 is: 318,660.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    362,128.30 : 543,192.45 = 212,440.30 : x
  2. Step 2: Convert to fraction form
    362,128.30/543,192.45 = 212,440.30/x
  3. Step 3: Cross multiply
    362,128.30x = 543,192.45 × 212,440.30
  4. Step 4: Simplify right side
    362,128.30x = 115,395,967,035.74
  5. Step 5: Solve for x
    x = 115,395,967,035.74/362,128.30
  6. Step 6: Final answer
    x = 318,660.45

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Similar ratio
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1.5x scale

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.