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Finding the Fourth Proportional to 549,388.86, 823,988.79 and 165,131.88

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Solution

The fourth proportional to 549,388.86, 823,988.79 and 165,131.88 is: 247,669.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    549,388.86 : 823,988.79 = 165,131.88 : x
  2. Step 2: Convert to fraction form
    549,388.86/823,988.79 = 165,131.88/x
  3. Step 3: Cross multiply
    549,388.86x = 823,988.79 × 165,131.88
  4. Step 4: Simplify right side
    549,388.86x = 136,066,817,991.63
  5. Step 5: Solve for x
    x = 136,066,817,991.63/549,388.86
  6. Step 6: Final answer
    x = 247,669.42

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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.