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Finding the Fourth Proportional to 391,047.39, 539,645.37 and 212,199.39

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Solution

The fourth proportional to 391,047.39, 539,645.37 and 212,199.39 is: 292,835.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,047.39 : 539,645.37 = 212,199.39 : x
  2. Step 2: Convert to fraction form
    391,047.39/539,645.37 = 212,199.39/x
  3. Step 3: Cross multiply
    391,047.39x = 539,645.37 × 212,199.39
  4. Step 4: Simplify right side
    391,047.39x = 114,512,418,330.32
  5. Step 5: Solve for x
    x = 114,512,418,330.32/391,047.39
  6. Step 6: Final answer
    x = 292,835.14

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1.5x scale

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.