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Finding the Fourth Proportional to 2,263.78, 3,394.55 and 802.72

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Solution

The fourth proportional to 2,263.78, 3,394.55 and 802.72 is: 1,203.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,263.78 : 3,394.55 = 802.72 : x
  2. Step 2: Convert to fraction form
    2,263.78/3,394.55 = 802.72/x
  3. Step 3: Cross multiply
    2,263.78x = 3,394.55 × 802.72
  4. Step 4: Simplify right side
    2,263.78x = 2,724,873.18
  5. Step 5: Solve for x
    x = 2,724,873.18/2,263.78
  6. Step 6: Final answer
    x = 1,203.68

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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.