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Finding the Fourth Proportional to 310,614.60, 465,921.90 and 198,640.20

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Solution

The fourth proportional to 310,614.60, 465,921.90 and 198,640.20 is: 297,960.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,614.60 : 465,921.90 = 198,640.20 : x
  2. Step 2: Convert to fraction form
    310,614.60/465,921.90 = 198,640.20/x
  3. Step 3: Cross multiply
    310,614.60x = 465,921.90 × 198,640.20
  4. Step 4: Simplify right side
    310,614.60x = 92,550,819,400.38
  5. Step 5: Solve for x
    x = 92,550,819,400.38/310,614.60
  6. Step 6: Final answer
    x = 297,960.30

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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.