Home / 319,040.20-478,560.30-178,780.60

Finding the Fourth Proportional to 319,040.20, 478,560.30 and 178,780.60

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Solution

The fourth proportional to 319,040.20, 478,560.30 and 178,780.60 is: 268,170.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,040.20 : 478,560.30 = 178,780.60 : x
  2. Step 2: Convert to fraction form
    319,040.20/478,560.30 = 178,780.60/x
  3. Step 3: Cross multiply
    319,040.20x = 478,560.30 × 178,780.60
  4. Step 4: Simplify right side
    319,040.20x = 85,557,297,570.18
  5. Step 5: Solve for x
    x = 85,557,297,570.18/319,040.20
  6. Step 6: Final answer
    x = 268,170.90

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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.