Home / 318,877.20-478,374.66-131,903.28

Finding the Fourth Proportional to 318,877.20, 478,374.66 and 131,903.28

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Solution

The fourth proportional to 318,877.20, 478,374.66 and 131,903.28 is: 197,879.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,877.20 : 478,374.66 = 131,903.28 : x
  2. Step 2: Convert to fraction form
    318,877.20/478,374.66 = 131,903.28/x
  3. Step 3: Cross multiply
    318,877.20x = 478,374.66 × 131,903.28
  4. Step 4: Simplify right side
    318,877.20x = 63,099,186,722.88
  5. Step 5: Solve for x
    x = 63,099,186,722.88/318,877.20
  6. Step 6: Final answer
    x = 197,879.27

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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.