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Finding the Fourth Proportional to 391,593.51, 540,432.06 and 219,508.71

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Solution

The fourth proportional to 391,593.51, 540,432.06 and 219,508.71 is: 302,940.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,593.51 : 540,432.06 = 219,508.71 : x
  2. Step 2: Convert to fraction form
    391,593.51/540,432.06 = 219,508.71/x
  3. Step 3: Cross multiply
    391,593.51x = 540,432.06 × 219,508.71
  4. Step 4: Simplify right side
    391,593.51x = 118,629,544,333.24
  5. Step 5: Solve for x
    x = 118,629,544,333.24/391,593.51
  6. Step 6: Final answer
    x = 302,940.53

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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.