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Finding the Fourth Proportional to 388,296.81, 536,014.92 and 261,046.21

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Solution

The fourth proportional to 388,296.81, 536,014.92 and 261,046.21 is: 360,354.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,296.81 : 536,014.92 = 261,046.21 : x
  2. Step 2: Convert to fraction form
    388,296.81/536,014.92 = 261,046.21/x
  3. Step 3: Cross multiply
    388,296.81x = 536,014.92 × 261,046.21
  4. Step 4: Simplify right side
    388,296.81x = 139,924,663,369.45
  5. Step 5: Solve for x
    x = 139,924,663,369.45/388,296.81
  6. Step 6: Final answer
    x = 360,354.91

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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.