Home / 318,915.20-478,430.40-131,945.60

Finding the Fourth Proportional to 318,915.20, 478,430.40 and 131,945.60

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Solution

The fourth proportional to 318,915.20, 478,430.40 and 131,945.60 is: 197,942.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,915.20 : 478,430.40 = 131,945.60 : x
  2. Step 2: Convert to fraction form
    318,915.20/478,430.40 = 131,945.60/x
  3. Step 3: Cross multiply
    318,915.20x = 478,430.40 × 131,945.60
  4. Step 4: Simplify right side
    318,915.20x = 63,126,786,186.24
  5. Step 5: Solve for x
    x = 63,126,786,186.24/318,915.20
  6. Step 6: Final answer
    x = 197,942.23

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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.