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Finding the Fourth Proportional to 388,351.68, 536,091.15 and 261,101.07

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Solution

The fourth proportional to 388,351.68, 536,091.15 and 261,101.07 is: 360,430.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,351.68 : 536,091.15 = 261,101.07 : x
  2. Step 2: Convert to fraction form
    388,351.68/536,091.15 = 261,101.07/x
  3. Step 3: Cross multiply
    388,351.68x = 536,091.15 × 261,101.07
  4. Step 4: Simplify right side
    388,351.68x = 139,973,972,882.53
  5. Step 5: Solve for x
    x = 139,973,972,882.53/388,351.68
  6. Step 6: Final answer
    x = 360,430.97

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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.