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Finding the Fourth Proportional to 388,295.31, 536,012.85 and 261,044.71

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Solution

The fourth proportional to 388,295.31, 536,012.85 and 261,044.71 is: 360,352.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,295.31 : 536,012.85 = 261,044.71 : x
  2. Step 2: Convert to fraction form
    388,295.31/536,012.85 = 261,044.71/x
  3. Step 3: Cross multiply
    388,295.31x = 536,012.85 × 261,044.71
  4. Step 4: Simplify right side
    388,295.31x = 139,923,318,984.52
  5. Step 5: Solve for x
    x = 139,923,318,984.52/388,295.31
  6. Step 6: Final answer
    x = 360,352.85

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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.