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Finding the Fourth Proportional to 279,813.44, 386,131.28 and 152,486.30

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Solution

The fourth proportional to 279,813.44, 386,131.28 and 152,486.30 is: 210,424.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,813.44 : 386,131.28 = 152,486.30 : x
  2. Step 2: Convert to fraction form
    279,813.44/386,131.28 = 152,486.30/x
  3. Step 3: Cross multiply
    279,813.44x = 386,131.28 × 152,486.30
  4. Step 4: Simplify right side
    279,813.44x = 58,879,727,508.38
  5. Step 5: Solve for x
    x = 58,879,727,508.38/279,813.44
  6. Step 6: Final answer
    x = 210,424.95

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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.