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Finding the Fourth Proportional to 1,662.15, 2,492.67 and 551.31

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Solution

The fourth proportional to 1,662.15, 2,492.67 and 551.31 is: 826.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,662.15 : 2,492.67 = 551.31 : x
  2. Step 2: Convert to fraction form
    1,662.15/2,492.67 = 551.31/x
  3. Step 3: Cross multiply
    1,662.15x = 2,492.67 × 551.31
  4. Step 4: Simplify right side
    1,662.15x = 1,374,233.63
  5. Step 5: Solve for x
    x = 1,374,233.63/1,662.15
  6. Step 6: Final answer
    x = 826.78

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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.