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Finding the Fourth Proportional to 515,451.39, 772,991.73 and 178,400.58

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Solution

The fourth proportional to 515,451.39, 772,991.73 and 178,400.58 is: 267,536.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,451.39 : 772,991.73 = 178,400.58 : x
  2. Step 2: Convert to fraction form
    515,451.39/772,991.73 = 178,400.58/x
  3. Step 3: Cross multiply
    515,451.39x = 772,991.73 × 178,400.58
  4. Step 4: Simplify right side
    515,451.39x = 137,902,172,967.20
  5. Step 5: Solve for x
    x = 137,902,172,967.20/515,451.39
  6. Step 6: Final answer
    x = 267,536.72

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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.