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Finding the Fourth Proportional to 343,676.20, 515,514.30 and 90,956.20

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Solution

The fourth proportional to 343,676.20, 515,514.30 and 90,956.20 is: 136,434.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,676.20 : 515,514.30 = 90,956.20 : x
  2. Step 2: Convert to fraction form
    343,676.20/515,514.30 = 90,956.20/x
  3. Step 3: Cross multiply
    343,676.20x = 515,514.30 × 90,956.20
  4. Step 4: Simplify right side
    343,676.20x = 46,889,221,773.66
  5. Step 5: Solve for x
    x = 46,889,221,773.66/343,676.20
  6. Step 6: Final answer
    x = 136,434.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.