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Finding the Fourth Proportional to 388,290.56, 536,006.31 and 261,039.96

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Solution

The fourth proportional to 388,290.56, 536,006.31 and 261,039.96 is: 360,346.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,290.56 : 536,006.31 = 261,039.96 : x
  2. Step 2: Convert to fraction form
    388,290.56/536,006.31 = 261,039.96/x
  3. Step 3: Cross multiply
    388,290.56x = 536,006.31 × 261,039.96
  4. Step 4: Simplify right side
    388,290.56x = 139,919,064,743.25
  5. Step 5: Solve for x
    x = 139,919,064,743.25/388,290.56
  6. Step 6: Final answer
    x = 360,346.30

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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.