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Finding the Fourth Proportional to 318,808.40, 439,956.87 and 191,486.12

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Solution

The fourth proportional to 318,808.40, 439,956.87 and 191,486.12 is: 264,251.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,808.40 : 439,956.87 = 191,486.12 : x
  2. Step 2: Convert to fraction form
    318,808.40/439,956.87 = 191,486.12/x
  3. Step 3: Cross multiply
    318,808.40x = 439,956.87 × 191,486.12
  4. Step 4: Simplify right side
    318,808.40x = 84,245,634,003.64
  5. Step 5: Solve for x
    x = 84,245,634,003.64/318,808.40
  6. Step 6: Final answer
    x = 264,251.61

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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.