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Finding the Fourth Proportional to 318,992.52, 478,562.90 and 108,632.28

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Solution

The fourth proportional to 318,992.52, 478,562.90 and 108,632.28 is: 162,973.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,992.52 : 478,562.90 = 108,632.28 : x
  2. Step 2: Convert to fraction form
    318,992.52/478,562.90 = 108,632.28/x
  3. Step 3: Cross multiply
    318,992.52x = 478,562.90 × 108,632.28
  4. Step 4: Simplify right side
    318,992.52x = 51,987,378,950.41
  5. Step 5: Solve for x
    x = 51,987,378,950.41/318,992.52
  6. Step 6: Final answer
    x = 162,973.66

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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.