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Finding the Fourth Proportional to 1,679.32, 2,518.99 and 446.71

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Solution

The fourth proportional to 1,679.32, 2,518.99 and 446.71 is: 670.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679.32 : 2,518.99 = 446.71 : x
  2. Step 2: Convert to fraction form
    1,679.32/2,518.99 = 446.71/x
  3. Step 3: Cross multiply
    1,679.32x = 2,518.99 × 446.71
  4. Step 4: Simplify right side
    1,679.32x = 1,125,258.02
  5. Step 5: Solve for x
    x = 1,125,258.02/1,679.32
  6. Step 6: Final answer
    x = 670.07

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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.