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Finding the Fourth Proportional to 1,671.10, 2,506.45 and 438.62

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Solution

The fourth proportional to 1,671.10, 2,506.45 and 438.62 is: 657.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,671.10 : 2,506.45 = 438.62 : x
  2. Step 2: Convert to fraction form
    1,671.10/2,506.45 = 438.62/x
  3. Step 3: Cross multiply
    1,671.10x = 2,506.45 × 438.62
  4. Step 4: Simplify right side
    1,671.10x = 1,099,379.10
  5. Step 5: Solve for x
    x = 1,099,379.10/1,671.10
  6. Step 6: Final answer
    x = 657.88

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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.