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Finding the Fourth Proportional to 661,799.93, 990,194.81 and 392,072.87

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Solution

The fourth proportional to 661,799.93, 990,194.81 and 392,072.87 is: 586,625.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,799.93 : 990,194.81 = 392,072.87 : x
  2. Step 2: Convert to fraction form
    661,799.93/990,194.81 = 392,072.87/x
  3. Step 3: Cross multiply
    661,799.93x = 990,194.81 × 392,072.87
  4. Step 4: Simplify right side
    661,799.93x = 388,228,521,530.93
  5. Step 5: Solve for x
    x = 388,228,521,530.93/661,799.93
  6. Step 6: Final answer
    x = 586,625.21

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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.