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Finding the Fourth Proportional to 391,053.60, 585,705.60 and 321,069.60

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Solution

The fourth proportional to 391,053.60, 585,705.60 and 321,069.60 is: 480,886.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,053.60 : 585,705.60 = 321,069.60 : x
  2. Step 2: Convert to fraction form
    391,053.60/585,705.60 = 321,069.60/x
  3. Step 3: Cross multiply
    391,053.60x = 585,705.60 × 321,069.60
  4. Step 4: Simplify right side
    391,053.60x = 188,052,262,709.76
  5. Step 5: Solve for x
    x = 188,052,262,709.76/391,053.60
  6. Step 6: Final answer
    x = 480,886.16

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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.