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Finding the Fourth Proportional to 399,838.28, 599,862.46 and 143,696.71

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Solution

The fourth proportional to 399,838.28, 599,862.46 and 143,696.71 is: 215,582.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,838.28 : 599,862.46 = 143,696.71 : x
  2. Step 2: Convert to fraction form
    399,838.28/599,862.46 = 143,696.71/x
  3. Step 3: Cross multiply
    399,838.28x = 599,862.46 × 143,696.71
  4. Step 4: Simplify right side
    399,838.28x = 86,198,261,954.51
  5. Step 5: Solve for x
    x = 86,198,261,954.51/399,838.28
  6. Step 6: Final answer
    x = 215,582.82

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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.