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Finding the Fourth Proportional to 212,717.60, 319,076.40 and 207,468.80

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Solution

The fourth proportional to 212,717.60, 319,076.40 and 207,468.80 is: 311,203.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,717.60 : 319,076.40 = 207,468.80 : x
  2. Step 2: Convert to fraction form
    212,717.60/319,076.40 = 207,468.80/x
  3. Step 3: Cross multiply
    212,717.60x = 319,076.40 × 207,468.80
  4. Step 4: Simplify right side
    212,717.60x = 66,198,397,816.32
  5. Step 5: Solve for x
    x = 66,198,397,816.32/212,717.60
  6. Step 6: Final answer
    x = 311,203.20

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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.