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Finding the Fourth Proportional to 398,806.80, 598,210.20 and 347,485.20

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Solution

The fourth proportional to 398,806.80, 598,210.20 and 347,485.20 is: 521,227.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,806.80 : 598,210.20 = 347,485.20 : x
  2. Step 2: Convert to fraction form
    398,806.80/598,210.20 = 347,485.20/x
  3. Step 3: Cross multiply
    398,806.80x = 598,210.20 × 347,485.20
  4. Step 4: Simplify right side
    398,806.80x = 207,869,190,989.04
  5. Step 5: Solve for x
    x = 207,869,190,989.04/398,806.80
  6. Step 6: Final answer
    x = 521,227.80

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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.