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Finding the Fourth Proportional to 391,166.10, 587,186.55 and 302,811.30

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Solution

The fourth proportional to 391,166.10, 587,186.55 and 302,811.30 is: 454,555.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,166.10 : 587,186.55 = 302,811.30 : x
  2. Step 2: Convert to fraction form
    391,166.10/587,186.55 = 302,811.30/x
  3. Step 3: Cross multiply
    391,166.10x = 587,186.55 × 302,811.30
  4. Step 4: Simplify right side
    391,166.10x = 177,806,722,548.02
  5. Step 5: Solve for x
    x = 177,806,722,548.02/391,166.10
  6. Step 6: Final answer
    x = 454,555.55

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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.