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Finding the Fourth Proportional to 622,803.40, 934,205.10 and 398,417.20

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Solution

The fourth proportional to 622,803.40, 934,205.10 and 398,417.20 is: 597,625.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,803.40 : 934,205.10 = 398,417.20 : x
  2. Step 2: Convert to fraction form
    622,803.40/934,205.10 = 398,417.20/x
  3. Step 3: Cross multiply
    622,803.40x = 934,205.10 × 398,417.20
  4. Step 4: Simplify right side
    622,803.40x = 372,203,380,167.72
  5. Step 5: Solve for x
    x = 372,203,380,167.72/622,803.40
  6. Step 6: Final answer
    x = 597,625.80

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.