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Finding the Fourth Proportional to 391,607.60, 586,536.60 and 321,623.60

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Solution

The fourth proportional to 391,607.60, 586,536.60 and 321,623.60 is: 481,716.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,607.60 : 586,536.60 = 321,623.60 : x
  2. Step 2: Convert to fraction form
    391,607.60/586,536.60 = 321,623.60/x
  3. Step 3: Cross multiply
    391,607.60x = 586,536.60 × 321,623.60
  4. Step 4: Simplify right side
    391,607.60x = 188,644,012,823.76
  5. Step 5: Solve for x
    x = 188,644,012,823.76/391,607.60
  6. Step 6: Final answer
    x = 481,716.94

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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.