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Finding the Fourth Proportional to 1,481.22, 2,221.22 and 507.40

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Solution

The fourth proportional to 1,481.22, 2,221.22 and 507.40 is: 760.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,481.22 : 2,221.22 = 507.40 : x
  2. Step 2: Convert to fraction form
    1,481.22/2,221.22 = 507.40/x
  3. Step 3: Cross multiply
    1,481.22x = 2,221.22 × 507.40
  4. Step 4: Simplify right side
    1,481.22x = 1,127,042.74
  5. Step 5: Solve for x
    x = 1,127,042.74/1,481.22
  6. Step 6: Final answer
    x = 760.89

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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.