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Finding the Fourth Proportional to 521,069.60, 779,530.80 and 451,719.20

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Solution

The fourth proportional to 521,069.60, 779,530.80 and 451,719.20 is: 675,781.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,069.60 : 779,530.80 = 451,719.20 : x
  2. Step 2: Convert to fraction form
    521,069.60/779,530.80 = 451,719.20/x
  3. Step 3: Cross multiply
    521,069.60x = 779,530.80 × 451,719.20
  4. Step 4: Simplify right side
    521,069.60x = 352,129,029,351.36
  5. Step 5: Solve for x
    x = 352,129,029,351.36/521,069.60
  6. Step 6: Final answer
    x = 675,781.18

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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.