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Finding the Fourth Proportional to 391,745.92, 540,609.60 and 212,897.92

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Solution

The fourth proportional to 391,745.92, 540,609.60 and 212,897.92 is: 293,799.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,745.92 : 540,609.60 = 212,897.92 : x
  2. Step 2: Convert to fraction form
    391,745.92/540,609.60 = 212,897.92/x
  3. Step 3: Cross multiply
    391,745.92x = 540,609.60 × 212,897.92
  4. Step 4: Simplify right side
    391,745.92x = 115,094,659,372.03
  5. Step 5: Solve for x
    x = 115,094,659,372.03/391,745.92
  6. Step 6: Final answer
    x = 293,799.25

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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.