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Finding the Fourth Proportional to 261,662.20, 392,090.10 and 194,788.60

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Solution

The fourth proportional to 261,662.20, 392,090.10 and 194,788.60 is: 291,882.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,662.20 : 392,090.10 = 194,788.60 : x
  2. Step 2: Convert to fraction form
    261,662.20/392,090.10 = 194,788.60/x
  3. Step 3: Cross multiply
    261,662.20x = 392,090.10 × 194,788.60
  4. Step 4: Simplify right side
    261,662.20x = 76,374,681,652.86
  5. Step 5: Solve for x
    x = 76,374,681,652.86/261,662.20
  6. Step 6: Final answer
    x = 291,882.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.