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Finding the Fourth Proportional to 279,813.25, 386,131.01 and 152,486.11

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Solution

The fourth proportional to 279,813.25, 386,131.01 and 152,486.11 is: 210,424.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,813.25 : 386,131.01 = 152,486.11 : x
  2. Step 2: Convert to fraction form
    279,813.25/386,131.01 = 152,486.11/x
  3. Step 3: Cross multiply
    279,813.25x = 386,131.01 × 152,486.11
  4. Step 4: Simplify right side
    279,813.25x = 58,879,615,081.16
  5. Step 5: Solve for x
    x = 58,879,615,081.16/279,813.25
  6. Step 6: Final answer
    x = 210,424.69

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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.