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Finding the Fourth Proportional to 388,290.56, 536,006.30 and 261,039.97

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Solution

The fourth proportional to 388,290.56, 536,006.30 and 261,039.97 is: 360,346.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,290.56 : 536,006.30 = 261,039.97 : x
  2. Step 2: Convert to fraction form
    388,290.56/536,006.30 = 261,039.97/x
  3. Step 3: Cross multiply
    388,290.56x = 536,006.30 × 261,039.97
  4. Step 4: Simplify right side
    388,290.56x = 139,919,064,821.58
  5. Step 5: Solve for x
    x = 139,919,064,821.58/388,290.56
  6. Step 6: Final answer
    x = 360,346.29

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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.