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Finding the Fourth Proportional to 515,317.72, 773,029.55 and 178,357.82

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Solution

The fourth proportional to 515,317.72, 773,029.55 and 178,357.82 is: 267,555.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,317.72 : 773,029.55 = 178,357.82 : x
  2. Step 2: Convert to fraction form
    515,317.72/773,029.55 = 178,357.82/x
  3. Step 3: Cross multiply
    515,317.72x = 773,029.55 × 178,357.82
  4. Step 4: Simplify right side
    515,317.72x = 137,875,867,935.13
  5. Step 5: Solve for x
    x = 137,875,867,935.13/515,317.72
  6. Step 6: Final answer
    x = 267,555.07

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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.