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Finding the Fourth Proportional to 391,109.58, 539,731.44 and 212,261.58

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Solution

The fourth proportional to 391,109.58, 539,731.44 and 212,261.58 is: 292,921.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,109.58 : 539,731.44 = 212,261.58 : x
  2. Step 2: Convert to fraction form
    391,109.58/539,731.44 = 212,261.58/x
  3. Step 3: Cross multiply
    391,109.58x = 539,731.44 × 212,261.58
  4. Step 4: Simplify right side
    391,109.58x = 114,564,248,230.08
  5. Step 5: Solve for x
    x = 114,564,248,230.08/391,109.58
  6. Step 6: Final answer
    x = 292,921.10

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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.