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Finding the Fourth Proportional to 391,111.71, 539,734.37 and 212,263.71

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Solution

The fourth proportional to 391,111.71, 539,734.37 and 212,263.71 is: 292,924.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,111.71 : 539,734.37 = 212,263.71 : x
  2. Step 2: Convert to fraction form
    391,111.71/539,734.37 = 212,263.71/x
  3. Step 3: Cross multiply
    391,111.71x = 539,734.37 × 212,263.71
  4. Step 4: Simplify right side
    391,111.71x = 114,566,019,790.71
  5. Step 5: Solve for x
    x = 114,566,019,790.71/391,111.71
  6. Step 6: Final answer
    x = 292,924.03

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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.