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Finding the Fourth Proportional to 381,353.79, 526,268.31 and 211,587.51

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Solution

The fourth proportional to 381,353.79, 526,268.31 and 211,587.51 is: 291,990.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,353.79 : 526,268.31 = 211,587.51 : x
  2. Step 2: Convert to fraction form
    381,353.79/526,268.31 = 211,587.51/x
  3. Step 3: Cross multiply
    381,353.79x = 526,268.31 × 211,587.51
  4. Step 4: Simplify right side
    381,353.79x = 111,351,801,304.81
  5. Step 5: Solve for x
    x = 111,351,801,304.81/381,353.79
  6. Step 6: Final answer
    x = 291,990.81

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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.