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Finding the Fourth Proportional to 391,926.60, 587,015.10 and 302,478.30

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Solution

The fourth proportional to 391,926.60, 587,015.10 and 302,478.30 is: 453,042.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,926.60 : 587,015.10 = 302,478.30 : x
  2. Step 2: Convert to fraction form
    391,926.60/587,015.10 = 302,478.30/x
  3. Step 3: Cross multiply
    391,926.60x = 587,015.10 × 302,478.30
  4. Step 4: Simplify right side
    391,926.60x = 177,559,329,522.33
  5. Step 5: Solve for x
    x = 177,559,329,522.33/391,926.60
  6. Step 6: Final answer
    x = 453,042.30

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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.