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Finding the Fourth Proportional to 1,487.10, 2,231.04 and 447.06

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Solution

The fourth proportional to 1,487.10, 2,231.04 and 447.06 is: 670.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.10 : 2,231.04 = 447.06 : x
  2. Step 2: Convert to fraction form
    1,487.10/2,231.04 = 447.06/x
  3. Step 3: Cross multiply
    1,487.10x = 2,231.04 × 447.06
  4. Step 4: Simplify right side
    1,487.10x = 997,408.74
  5. Step 5: Solve for x
    x = 997,408.74/1,487.10
  6. Step 6: Final answer
    x = 670.71

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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.