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Finding the Fourth Proportional to 318,912.40, 477,778.20 and 185,856.40

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Solution

The fourth proportional to 318,912.40, 477,778.20 and 185,856.40 is: 278,440.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,912.40 : 477,778.20 = 185,856.40 : x
  2. Step 2: Convert to fraction form
    318,912.40/477,778.20 = 185,856.40/x
  3. Step 3: Cross multiply
    318,912.40x = 477,778.20 × 185,856.40
  4. Step 4: Simplify right side
    318,912.40x = 88,798,136,250.48
  5. Step 5: Solve for x
    x = 88,798,136,250.48/318,912.40
  6. Step 6: Final answer
    x = 278,440.53

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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.