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Finding the Fourth Proportional to 355,484.73, 490,574.78 and 212,257.29

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Solution

The fourth proportional to 355,484.73, 490,574.78 and 212,257.29 is: 292,918.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,484.73 : 490,574.78 = 212,257.29 : x
  2. Step 2: Convert to fraction form
    355,484.73/490,574.78 = 212,257.29/x
  3. Step 3: Cross multiply
    355,484.73x = 490,574.78 × 212,257.29
  4. Step 4: Simplify right side
    355,484.73x = 104,128,073,345.15
  5. Step 5: Solve for x
    x = 104,128,073,345.15/355,484.73
  6. Step 6: Final answer
    x = 292,918.55

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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.