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Finding the Fourth Proportional to 399,197.20, 598,666.20 and 132,912.40

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Solution

The fourth proportional to 399,197.20, 598,666.20 and 132,912.40 is: 199,325.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,197.20 : 598,666.20 = 132,912.40 : x
  2. Step 2: Convert to fraction form
    399,197.20/598,666.20 = 132,912.40/x
  3. Step 3: Cross multiply
    399,197.20x = 598,666.20 × 132,912.40
  4. Step 4: Simplify right side
    399,197.20x = 79,570,161,440.88
  5. Step 5: Solve for x
    x = 79,570,161,440.88/399,197.20
  6. Step 6: Final answer
    x = 199,325.45

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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.