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Finding the Fourth Proportional to 2,528.81, 3,792.98 and 679.86

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Solution

The fourth proportional to 2,528.81, 3,792.98 and 679.86 is: 1,019.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,528.81 : 3,792.98 = 679.86 : x
  2. Step 2: Convert to fraction form
    2,528.81/3,792.98 = 679.86/x
  3. Step 3: Cross multiply
    2,528.81x = 3,792.98 × 679.86
  4. Step 4: Simplify right side
    2,528.81x = 2,578,673.02
  5. Step 5: Solve for x
    x = 2,578,673.02/2,528.81
  6. Step 6: Final answer
    x = 1,019.72

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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.