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Finding the Fourth Proportional to 1,679.35, 2,518.75 and 446.79

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Solution

The fourth proportional to 1,679.35, 2,518.75 and 446.79 is: 670.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679.35 : 2,518.75 = 446.79 : x
  2. Step 2: Convert to fraction form
    1,679.35/2,518.75 = 446.79/x
  3. Step 3: Cross multiply
    1,679.35x = 2,518.75 × 446.79
  4. Step 4: Simplify right side
    1,679.35x = 1,125,352.31
  5. Step 5: Solve for x
    x = 1,125,352.31/1,679.35
  6. Step 6: Final answer
    x = 670.11

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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.