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Finding the Fourth Proportional to 399,147.38, 550,823.38 and 272,045.01

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Solution

The fourth proportional to 399,147.38, 550,823.38 and 272,045.01 is: 375,422.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,147.38 : 550,823.38 = 272,045.01 : x
  2. Step 2: Convert to fraction form
    399,147.38/550,823.38 = 272,045.01/x
  3. Step 3: Cross multiply
    399,147.38x = 550,823.38 × 272,045.01
  4. Step 4: Simplify right side
    399,147.38x = 149,848,751,240.22
  5. Step 5: Solve for x
    x = 149,848,751,240.22/399,147.38
  6. Step 6: Final answer
    x = 375,422.11

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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.