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Finding the Fourth Proportional to 398,696.99, 598,146.53 and 132,458.90

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Solution

The fourth proportional to 398,696.99, 598,146.53 and 132,458.90 is: 198,721.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,696.99 : 598,146.53 = 132,458.90 : x
  2. Step 2: Convert to fraction form
    398,696.99/598,146.53 = 132,458.90/x
  3. Step 3: Cross multiply
    398,696.99x = 598,146.53 × 132,458.90
  4. Step 4: Simplify right side
    398,696.99x = 79,229,827,749.59
  5. Step 5: Solve for x
    x = 79,229,827,749.59/398,696.99
  6. Step 6: Final answer
    x = 198,721.91

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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.