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Finding the Fourth Proportional to 212,960.40, 319,440.60 and 159,816.30

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Solution

The fourth proportional to 212,960.40, 319,440.60 and 159,816.30 is: 239,724.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,960.40 : 319,440.60 = 159,816.30 : x
  2. Step 2: Convert to fraction form
    212,960.40/319,440.60 = 159,816.30/x
  3. Step 3: Cross multiply
    212,960.40x = 319,440.60 × 159,816.30
  4. Step 4: Simplify right side
    212,960.40x = 51,051,814,761.78
  5. Step 5: Solve for x
    x = 51,051,814,761.78/212,960.40
  6. Step 6: Final answer
    x = 239,724.45

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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.