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Finding the Fourth Proportional to 391,112.83, 539,735.93 and 212,264.83

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Solution

The fourth proportional to 391,112.83, 539,735.93 and 212,264.83 is: 292,925.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,112.83 : 539,735.93 = 212,264.83 : x
  2. Step 2: Convert to fraction form
    391,112.83/539,735.93 = 212,264.83/x
  3. Step 3: Cross multiply
    391,112.83x = 539,735.93 × 212,264.83
  4. Step 4: Simplify right side
    391,112.83x = 114,566,955,426.34
  5. Step 5: Solve for x
    x = 114,566,955,426.34/391,112.83
  6. Step 6: Final answer
    x = 292,925.59

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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.