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Finding the Fourth Proportional to 355,218.92, 490,031.22 and 258,272.55

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Solution

The fourth proportional to 355,218.92, 490,031.22 and 258,272.55 is: 356,291.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,218.92 : 490,031.22 = 258,272.55 : x
  2. Step 2: Convert to fraction form
    355,218.92/490,031.22 = 258,272.55/x
  3. Step 3: Cross multiply
    355,218.92x = 490,031.22 × 258,272.55
  4. Step 4: Simplify right side
    355,218.92x = 126,561,612,284.75
  5. Step 5: Solve for x
    x = 126,561,612,284.75/355,218.92
  6. Step 6: Final answer
    x = 356,291.87

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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.