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Finding the Fourth Proportional to 328,648.92, 493,039.80 and 139,108.92

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Solution

The fourth proportional to 328,648.92, 493,039.80 and 139,108.92 is: 208,691.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,648.92 : 493,039.80 = 139,108.92 : x
  2. Step 2: Convert to fraction form
    328,648.92/493,039.80 = 139,108.92/x
  3. Step 3: Cross multiply
    328,648.92x = 493,039.80 × 139,108.92
  4. Step 4: Simplify right side
    328,648.92x = 68,586,234,095.02
  5. Step 5: Solve for x
    x = 68,586,234,095.02/328,648.92
  6. Step 6: Final answer
    x = 208,691.49

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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.