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Finding the Fourth Proportional to 515,345.86, 773,011.11 and 178,631.62

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Solution

The fourth proportional to 515,345.86, 773,011.11 and 178,631.62 is: 267,944.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,345.86 : 773,011.11 = 178,631.62 : x
  2. Step 2: Convert to fraction form
    515,345.86/773,011.11 = 178,631.62/x
  3. Step 3: Cross multiply
    515,345.86x = 773,011.11 × 178,631.62
  4. Step 4: Simplify right side
    515,345.86x = 138,084,226,857.30
  5. Step 5: Solve for x
    x = 138,084,226,857.30/515,345.86
  6. Step 6: Final answer
    x = 267,944.77

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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.