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Finding the Fourth Proportional to 391,729.92, 540,587.52 and 212,881.92

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Solution

The fourth proportional to 391,729.92, 540,587.52 and 212,881.92 is: 293,777.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,729.92 : 540,587.52 = 212,881.92 : x
  2. Step 2: Convert to fraction form
    391,729.92/540,587.52 = 212,881.92/x
  3. Step 3: Cross multiply
    391,729.92x = 540,587.52 × 212,881.92
  4. Step 4: Simplify right side
    391,729.92x = 115,081,309,185.64
  5. Step 5: Solve for x
    x = 115,081,309,185.64/391,729.92
  6. Step 6: Final answer
    x = 293,777.17

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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.