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Finding the Fourth Proportional to 381,335.79, 526,243.46 and 211,569.51

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Solution

The fourth proportional to 381,335.79, 526,243.46 and 211,569.51 is: 291,965.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,335.79 : 526,243.46 = 211,569.51 : x
  2. Step 2: Convert to fraction form
    381,335.79/526,243.46 = 211,569.51/x
  3. Step 3: Cross multiply
    381,335.79x = 526,243.46 × 211,569.51
  4. Step 4: Simplify right side
    381,335.79x = 111,337,069,915.06
  5. Step 5: Solve for x
    x = 111,337,069,915.06/381,335.79
  6. Step 6: Final answer
    x = 291,965.96

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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.