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Finding the Fourth Proportional to 355,414.08, 490,390.56 and 212,220.48

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Solution

The fourth proportional to 355,414.08, 490,390.56 and 212,220.48 is: 292,815.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,414.08 : 490,390.56 = 212,220.48 : x
  2. Step 2: Convert to fraction form
    355,414.08/490,390.56 = 212,220.48/x
  3. Step 3: Cross multiply
    355,414.08x = 490,390.56 × 212,220.48
  4. Step 4: Simplify right side
    355,414.08x = 104,070,920,030.67
  5. Step 5: Solve for x
    x = 104,070,920,030.67/355,414.08
  6. Step 6: Final answer
    x = 292,815.97

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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.