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Finding the Fourth Proportional to 512,207.40, 768,311.10 and 157,222.20

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Solution

The fourth proportional to 512,207.40, 768,311.10 and 157,222.20 is: 235,833.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,207.40 : 768,311.10 = 157,222.20 : x
  2. Step 2: Convert to fraction form
    512,207.40/768,311.10 = 157,222.20/x
  3. Step 3: Cross multiply
    512,207.40x = 768,311.10 × 157,222.20
  4. Step 4: Simplify right side
    512,207.40x = 120,795,561,426.42
  5. Step 5: Solve for x
    x = 120,795,561,426.42/512,207.40
  6. Step 6: Final answer
    x = 235,833.30

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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.