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Finding the Fourth Proportional to 328,056.80, 492,085.20 and 106,440.80

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Solution

The fourth proportional to 328,056.80, 492,085.20 and 106,440.80 is: 159,661.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,056.80 : 492,085.20 = 106,440.80 : x
  2. Step 2: Convert to fraction form
    328,056.80/492,085.20 = 106,440.80/x
  3. Step 3: Cross multiply
    328,056.80x = 492,085.20 × 106,440.80
  4. Step 4: Simplify right side
    328,056.80x = 52,377,942,356.16
  5. Step 5: Solve for x
    x = 52,377,942,356.16/328,056.80
  6. Step 6: Final answer
    x = 159,661.20

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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.