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Finding the Fourth Proportional to 245,268.72, 338,472.02 and 143,300

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Solution

The fourth proportional to 245,268.72, 338,472.02 and 143,300 is: 197,754.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,268.72 : 338,472.02 = 143,300 : x
  2. Step 2: Convert to fraction form
    245,268.72/338,472.02 = 143,300/x
  3. Step 3: Cross multiply
    245,268.72x = 338,472.02 × 143,300
  4. Step 4: Simplify right side
    245,268.72x = 48,503,040,466
  5. Step 5: Solve for x
    x = 48,503,040,466/245,268.72
  6. Step 6: Final answer
    x = 197,754.69

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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.