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Finding the Fourth Proportional to 391,522.40, 587,283.60 and 328,536.80

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Solution

The fourth proportional to 391,522.40, 587,283.60 and 328,536.80 is: 492,805.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,522.40 : 587,283.60 = 328,536.80 : x
  2. Step 2: Convert to fraction form
    391,522.40/587,283.60 = 328,536.80/x
  3. Step 3: Cross multiply
    391,522.40x = 587,283.60 × 328,536.80
  4. Step 4: Simplify right side
    391,522.40x = 192,944,274,636.48
  5. Step 5: Solve for x
    x = 192,944,274,636.48/391,522.40
  6. Step 6: Final answer
    x = 492,805.20

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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.