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Finding the Fourth Proportional to 392,028.10, 548,139.50 and 392,028.10

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Solution

The fourth proportional to 392,028.10, 548,139.50 and 392,028.10 is: 548,139.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,028.10 : 548,139.50 = 392,028.10 : x
  2. Step 2: Convert to fraction form
    392,028.10/548,139.50 = 392,028.10/x
  3. Step 3: Cross multiply
    392,028.10x = 548,139.50 × 392,028.10
  4. Step 4: Simplify right side
    392,028.10x = 214,886,086,719.95
  5. Step 5: Solve for x
    x = 214,886,086,719.95/392,028.10
  6. Step 6: Final answer
    x = 548,139.50

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.