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Finding the Fourth Proportional to 319,231.20, 478,846.80 and 141,549.60

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Solution

The fourth proportional to 319,231.20, 478,846.80 and 141,549.60 is: 212,324.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,231.20 : 478,846.80 = 141,549.60 : x
  2. Step 2: Convert to fraction form
    319,231.20/478,846.80 = 141,549.60/x
  3. Step 3: Cross multiply
    319,231.20x = 478,846.80 × 141,549.60
  4. Step 4: Simplify right side
    319,231.20x = 67,780,573,001.28
  5. Step 5: Solve for x
    x = 67,780,573,001.28/319,231.20
  6. Step 6: Final answer
    x = 212,324.40

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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.