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Finding the Fourth Proportional to 2,658.72, 3,670.80 and 1,664.40

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Solution

The fourth proportional to 2,658.72, 3,670.80 and 1,664.40 is: 2,297.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,658.72 : 3,670.80 = 1,664.40 : x
  2. Step 2: Convert to fraction form
    2,658.72/3,670.80 = 1,664.40/x
  3. Step 3: Cross multiply
    2,658.72x = 3,670.80 × 1,664.40
  4. Step 4: Simplify right side
    2,658.72x = 6,109,679.52
  5. Step 5: Solve for x
    x = 6,109,679.52/2,658.72
  6. Step 6: Final answer
    x = 2,297.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.