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Finding the Fourth Proportional to 388,291.56, 536,007.69 and 261,040.96

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Solution

The fourth proportional to 388,291.56, 536,007.69 and 261,040.96 is: 360,347.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,291.56 : 536,007.69 = 261,040.96 : x
  2. Step 2: Convert to fraction form
    388,291.56/536,007.69 = 261,040.96/x
  3. Step 3: Cross multiply
    388,291.56x = 536,007.69 × 261,040.96
  4. Step 4: Simplify right side
    388,291.56x = 139,919,961,964.98
  5. Step 5: Solve for x
    x = 139,919,961,964.98/388,291.56
  6. Step 6: Final answer
    x = 360,347.68

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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.