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Finding the Fourth Proportional to 328,861.08, 493,280.76 and 139,270.80

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Solution

The fourth proportional to 328,861.08, 493,280.76 and 139,270.80 is: 208,901.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,861.08 : 493,280.76 = 139,270.80 : x
  2. Step 2: Convert to fraction form
    328,861.08/493,280.76 = 139,270.80/x
  3. Step 3: Cross multiply
    328,861.08x = 493,280.76 × 139,270.80
  4. Step 4: Simplify right side
    328,861.08x = 68,699,606,069.81
  5. Step 5: Solve for x
    x = 68,699,606,069.81/328,861.08
  6. Step 6: Final answer
    x = 208,901.60

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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.