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Finding the Fourth Proportional to 355,878.90, 491,098.25 and 212,717.88

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Solution

The fourth proportional to 355,878.90, 491,098.25 and 212,717.88 is: 293,541.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,878.90 : 491,098.25 = 212,717.88 : x
  2. Step 2: Convert to fraction form
    355,878.90/491,098.25 = 212,717.88/x
  3. Step 3: Cross multiply
    355,878.90x = 491,098.25 × 212,717.88
  4. Step 4: Simplify right side
    355,878.90x = 104,465,379,573.56
  5. Step 5: Solve for x
    x = 104,465,379,573.56/355,878.90
  6. Step 6: Final answer
    x = 293,541.93

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1.5x scale

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.