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Finding the Fourth Proportional to 387,662.76, 581,639.94 and 134,962.20

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Solution

The fourth proportional to 387,662.76, 581,639.94 and 134,962.20 is: 202,494.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,662.76 : 581,639.94 = 134,962.20 : x
  2. Step 2: Convert to fraction form
    387,662.76/581,639.94 = 134,962.20/x
  3. Step 3: Cross multiply
    387,662.76x = 581,639.94 × 134,962.20
  4. Step 4: Simplify right side
    387,662.76x = 78,499,405,910.27
  5. Step 5: Solve for x
    x = 78,499,405,910.27/387,662.76
  6. Step 6: Final answer
    x = 202,494.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.