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Finding the Fourth Proportional to 391,346.10, 587,456.55 and 302,991.30

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Solution

The fourth proportional to 391,346.10, 587,456.55 and 302,991.30 is: 454,825.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,346.10 : 587,456.55 = 302,991.30 : x
  2. Step 2: Convert to fraction form
    391,346.10/587,456.55 = 302,991.30/x
  3. Step 3: Cross multiply
    391,346.10x = 587,456.55 × 302,991.30
  4. Step 4: Simplify right side
    391,346.10x = 177,994,223,778.02
  5. Step 5: Solve for x
    x = 177,994,223,778.02/391,346.10
  6. Step 6: Final answer
    x = 454,825.60

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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.