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Finding the Fourth Proportional to 319,239.20, 478,858.80 and 177,521.60

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Solution

The fourth proportional to 319,239.20, 478,858.80 and 177,521.60 is: 266,282.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,239.20 : 478,858.80 = 177,521.60 : x
  2. Step 2: Convert to fraction form
    319,239.20/478,858.80 = 177,521.60/x
  3. Step 3: Cross multiply
    319,239.20x = 478,858.80 × 177,521.60
  4. Step 4: Simplify right side
    319,239.20x = 85,007,780,350.08
  5. Step 5: Solve for x
    x = 85,007,780,350.08/319,239.20
  6. Step 6: Final answer
    x = 266,282.40

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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.