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Finding the Fourth Proportional to 1,671.72, 2,507.64 and 439.08

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Solution

The fourth proportional to 1,671.72, 2,507.64 and 439.08 is: 658.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,671.72 : 2,507.64 = 439.08 : x
  2. Step 2: Convert to fraction form
    1,671.72/2,507.64 = 439.08/x
  3. Step 3: Cross multiply
    1,671.72x = 2,507.64 × 439.08
  4. Step 4: Simplify right side
    1,671.72x = 1,101,054.57
  5. Step 5: Solve for x
    x = 1,101,054.57/1,671.72
  6. Step 6: Final answer
    x = 658.64

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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.