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Finding the Fourth Proportional to 398,861.63, 598,297.65 and 132,622.13

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Solution

The fourth proportional to 398,861.63, 598,297.65 and 132,622.13 is: 198,934.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,861.63 : 598,297.65 = 132,622.13 : x
  2. Step 2: Convert to fraction form
    398,861.63/598,297.65 = 132,622.13/x
  3. Step 3: Cross multiply
    398,861.63x = 598,297.65 × 132,622.13
  4. Step 4: Simplify right side
    398,861.63x = 79,347,510,212.74
  5. Step 5: Solve for x
    x = 79,347,510,212.74/398,861.63
  6. Step 6: Final answer
    x = 198,934.93

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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.