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Finding the Fourth Proportional to 355,908.32, 491,104.92 and 212,637.92

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Solution

The fourth proportional to 355,908.32, 491,104.92 and 212,637.92 is: 293,411.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,908.32 : 491,104.92 = 212,637.92 : x
  2. Step 2: Convert to fraction form
    355,908.32/491,104.92 = 212,637.92/x
  3. Step 3: Cross multiply
    355,908.32x = 491,104.92 × 212,637.92
  4. Step 4: Simplify right side
    355,908.32x = 104,427,528,690.57
  5. Step 5: Solve for x
    x = 104,427,528,690.57/355,908.32
  6. Step 6: Final answer
    x = 293,411.32

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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.