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Finding the Fourth Proportional to 391,581.29, 587,372.45 and 107,274.35

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Solution

The fourth proportional to 391,581.29, 587,372.45 and 107,274.35 is: 160,911.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,581.29 : 587,372.45 = 107,274.35 : x
  2. Step 2: Convert to fraction form
    391,581.29/587,372.45 = 107,274.35/x
  3. Step 3: Cross multiply
    391,581.29x = 587,372.45 × 107,274.35
  4. Step 4: Simplify right side
    391,581.29x = 63,009,994,308.42
  5. Step 5: Solve for x
    x = 63,009,994,308.42/391,581.29
  6. Step 6: Final answer
    x = 160,911.66

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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.