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Finding the Fourth Proportional to 388,293.31, 536,010.09 and 261,042.71

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Solution

The fourth proportional to 388,293.31, 536,010.09 and 261,042.71 is: 360,350.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,293.31 : 536,010.09 = 261,042.71 : x
  2. Step 2: Convert to fraction form
    388,293.31/536,010.09 = 261,042.71/x
  3. Step 3: Cross multiply
    388,293.31x = 536,010.09 × 261,042.71
  4. Step 4: Simplify right side
    388,293.31x = 139,921,526,480.94
  5. Step 5: Solve for x
    x = 139,921,526,480.94/388,293.31
  6. Step 6: Final answer
    x = 360,350.09

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1.5x scale

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.