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Finding the Fourth Proportional to 548,017.72, 756,261.28 and 306,299.88

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Solution

The fourth proportional to 548,017.72, 756,261.28 and 306,299.88 is: 422,692.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,017.72 : 756,261.28 = 306,299.88 : x
  2. Step 2: Convert to fraction form
    548,017.72/756,261.28 = 306,299.88/x
  3. Step 3: Cross multiply
    548,017.72x = 756,261.28 × 306,299.88
  4. Step 4: Simplify right side
    548,017.72x = 231,642,739,312.65
  5. Step 5: Solve for x
    x = 231,642,739,312.65/548,017.72
  6. Step 6: Final answer
    x = 422,692.06

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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.