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Finding the Fourth Proportional to 388,291.62, 536,007.78 and 261,041.03

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Solution

The fourth proportional to 388,291.62, 536,007.78 and 261,041.03 is: 360,347.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,291.62 : 536,007.78 = 261,041.03 : x
  2. Step 2: Convert to fraction form
    388,291.62/536,007.78 = 261,041.03/x
  3. Step 3: Cross multiply
    388,291.62x = 536,007.78 × 261,041.03
  4. Step 4: Simplify right side
    388,291.62x = 139,920,018,993.97
  5. Step 5: Solve for x
    x = 139,920,018,993.97/388,291.62
  6. Step 6: Final answer
    x = 360,347.77

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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.