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Finding the Fourth Proportional to 552,139.40, 828,209.10 and 328,190.60

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Solution

The fourth proportional to 552,139.40, 828,209.10 and 328,190.60 is: 492,285.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    552,139.40 : 828,209.10 = 328,190.60 : x
  2. Step 2: Convert to fraction form
    552,139.40/828,209.10 = 328,190.60/x
  3. Step 3: Cross multiply
    552,139.40x = 828,209.10 × 328,190.60
  4. Step 4: Simplify right side
    552,139.40x = 271,810,441,454.46
  5. Step 5: Solve for x
    x = 271,810,441,454.46/552,139.40
  6. Step 6: Final answer
    x = 492,285.90

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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.