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Finding the Fourth Proportional to 338,713, 508,069.76 and 86,012.44

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Solution

The fourth proportional to 338,713, 508,069.76 and 86,012.44 is: 129,018.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,713 : 508,069.76 = 86,012.44 : x
  2. Step 2: Convert to fraction form
    338,713/508,069.76 = 86,012.44/x
  3. Step 3: Cross multiply
    338,713x = 508,069.76 × 86,012.44
  4. Step 4: Simplify right side
    338,713x = 43,700,319,747.81
  5. Step 5: Solve for x
    x = 43,700,319,747.81/338,713
  6. Step 6: Final answer
    x = 129,018.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.