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Finding the Fourth Proportional to 391,570.40, 587,355.60 and 271,996.18

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Solution

The fourth proportional to 391,570.40, 587,355.60 and 271,996.18 is: 407,994.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,570.40 : 587,355.60 = 271,996.18 : x
  2. Step 2: Convert to fraction form
    391,570.40/587,355.60 = 271,996.18/x
  3. Step 3: Cross multiply
    391,570.40x = 587,355.60 × 271,996.18
  4. Step 4: Simplify right side
    391,570.40x = 159,758,476,564.83
  5. Step 5: Solve for x
    x = 159,758,476,564.83/391,570.40
  6. Step 6: Final answer
    x = 407,994.26

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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.