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Finding the Fourth Proportional to 2,792.40, 4,188.63 and 712.41

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Solution

The fourth proportional to 2,792.40, 4,188.63 and 712.41 is: 1,068.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,792.40 : 4,188.63 = 712.41 : x
  2. Step 2: Convert to fraction form
    2,792.40/4,188.63 = 712.41/x
  3. Step 3: Cross multiply
    2,792.40x = 4,188.63 × 712.41
  4. Step 4: Simplify right side
    2,792.40x = 2,984,021.90
  5. Step 5: Solve for x
    x = 2,984,021.90/2,792.40
  6. Step 6: Final answer
    x = 1,068.62

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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.