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Finding the Fourth Proportional to 329,211.02, 493,718.92 and 139,668.86

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Solution

The fourth proportional to 329,211.02, 493,718.92 and 139,668.86 is: 209,461.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,211.02 : 493,718.92 = 139,668.86 : x
  2. Step 2: Convert to fraction form
    329,211.02/493,718.92 = 139,668.86/x
  3. Step 3: Cross multiply
    329,211.02x = 493,718.92 × 139,668.86
  4. Step 4: Simplify right side
    329,211.02x = 68,957,158,716.83
  5. Step 5: Solve for x
    x = 68,957,158,716.83/329,211.02
  6. Step 6: Final answer
    x = 209,461.88

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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.