Home / 319,099.20-478,065.60-259,612.80

Finding the Fourth Proportional to 319,099.20, 478,065.60 and 259,612.80

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Solution

The fourth proportional to 319,099.20, 478,065.60 and 259,612.80 is: 388,944.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,099.20 : 478,065.60 = 259,612.80 : x
  2. Step 2: Convert to fraction form
    319,099.20/478,065.60 = 259,612.80/x
  3. Step 3: Cross multiply
    319,099.20x = 478,065.60 × 259,612.80
  4. Step 4: Simplify right side
    319,099.20x = 124,111,948,999.68
  5. Step 5: Solve for x
    x = 124,111,948,999.68/319,099.20
  6. Step 6: Final answer
    x = 388,944.72

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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.