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Finding the Fourth Proportional to 388,290.43, 536,006.13 and 261,039.84

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Solution

The fourth proportional to 388,290.43, 536,006.13 and 261,039.84 is: 360,346.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,290.43 : 536,006.13 = 261,039.84 : x
  2. Step 2: Convert to fraction form
    388,290.43/536,006.13 = 261,039.84/x
  3. Step 3: Cross multiply
    388,290.43x = 536,006.13 × 261,039.84
  4. Step 4: Simplify right side
    388,290.43x = 139,918,954,414.22
  5. Step 5: Solve for x
    x = 139,918,954,414.22/388,290.43
  6. Step 6: Final answer
    x = 360,346.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.