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Finding the Fourth Proportional to 355,892.10, 491,116.40 and 212,731.08

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Solution

The fourth proportional to 355,892.10, 491,116.40 and 212,731.08 is: 293,560.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,892.10 : 491,116.40 = 212,731.08 : x
  2. Step 2: Convert to fraction form
    355,892.10/491,116.40 = 212,731.08/x
  3. Step 3: Cross multiply
    355,892.10x = 491,116.40 × 212,731.08
  4. Step 4: Simplify right side
    355,892.10x = 104,475,722,177.71
  5. Step 5: Solve for x
    x = 104,475,722,177.71/355,892.10
  6. Step 6: Final answer
    x = 293,560.10

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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.