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Finding the Fourth Proportional to 387,958.65, 581,992.58 and 135,202.81

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Solution

The fourth proportional to 387,958.65, 581,992.58 and 135,202.81 is: 202,823.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,958.65 : 581,992.58 = 135,202.81 : x
  2. Step 2: Convert to fraction form
    387,958.65/581,992.58 = 135,202.81/x
  3. Step 3: Cross multiply
    387,958.65x = 581,992.58 × 135,202.81
  4. Step 4: Simplify right side
    387,958.65x = 78,687,032,215.15
  5. Step 5: Solve for x
    x = 78,687,032,215.15/387,958.65
  6. Step 6: Final answer
    x = 202,823.24

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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.