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Finding the Fourth Proportional to 1,027.39, 1,540.89 and 507.21

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Solution

The fourth proportional to 1,027.39, 1,540.89 and 507.21 is: 760.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,027.39 : 1,540.89 = 507.21 : x
  2. Step 2: Convert to fraction form
    1,027.39/1,540.89 = 507.21/x
  3. Step 3: Cross multiply
    1,027.39x = 1,540.89 × 507.21
  4. Step 4: Simplify right side
    1,027.39x = 781,554.82
  5. Step 5: Solve for x
    x = 781,554.82/1,027.39
  6. Step 6: Final answer
    x = 760.72

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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.