Home / 515,031.20-772,546.80-215,412.20

Finding the Fourth Proportional to 515,031.20, 772,546.80 and 215,412.20

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Solution

The fourth proportional to 515,031.20, 772,546.80 and 215,412.20 is: 323,118.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,031.20 : 772,546.80 = 215,412.20 : x
  2. Step 2: Convert to fraction form
    515,031.20/772,546.80 = 215,412.20/x
  3. Step 3: Cross multiply
    515,031.20x = 772,546.80 × 215,412.20
  4. Step 4: Simplify right side
    515,031.20x = 166,416,005,790.96
  5. Step 5: Solve for x
    x = 166,416,005,790.96/515,031.20
  6. Step 6: Final answer
    x = 323,118.30

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Similar ratio
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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.