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Finding the Fourth Proportional to 548,077.28, 756,442.90 and 318,705.54

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Solution

The fourth proportional to 548,077.28, 756,442.90 and 318,705.54 is: 439,869.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,077.28 : 756,442.90 = 318,705.54 : x
  2. Step 2: Convert to fraction form
    548,077.28/756,442.90 = 318,705.54/x
  3. Step 3: Cross multiply
    548,077.28x = 756,442.90 × 318,705.54
  4. Step 4: Simplify right side
    548,077.28x = 241,082,542,923.67
  5. Step 5: Solve for x
    x = 241,082,542,923.67/548,077.28
  6. Step 6: Final answer
    x = 439,869.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.