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Finding the Fourth Proportional to 622,810.20, 934,652.70 and 398,715.60

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Solution

The fourth proportional to 622,810.20, 934,652.70 and 398,715.60 is: 598,353.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,810.20 : 934,652.70 = 398,715.60 : x
  2. Step 2: Convert to fraction form
    622,810.20/934,652.70 = 398,715.60/x
  3. Step 3: Cross multiply
    622,810.20x = 934,652.70 × 398,715.60
  4. Step 4: Simplify right side
    622,810.20x = 372,660,612,072.12
  5. Step 5: Solve for x
    x = 372,660,612,072.12/622,810.20
  6. Step 6: Final answer
    x = 598,353.42

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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.