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Finding the Fourth Proportional to 548,346.80, 756,720.60 and 318,959.12

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Solution

The fourth proportional to 548,346.80, 756,720.60 and 318,959.12 is: 440,164.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,346.80 : 756,720.60 = 318,959.12 : x
  2. Step 2: Convert to fraction form
    548,346.80/756,720.60 = 318,959.12/x
  3. Step 3: Cross multiply
    548,346.80x = 756,720.60 × 318,959.12
  4. Step 4: Simplify right side
    548,346.80x = 241,362,936,661.87
  5. Step 5: Solve for x
    x = 241,362,936,661.87/548,346.80
  6. Step 6: Final answer
    x = 440,164.76

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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.