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Finding the Fourth Proportional to 1,705.23, 2,558.21 and 551.79

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Solution

The fourth proportional to 1,705.23, 2,558.21 and 551.79 is: 827.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,705.23 : 2,558.21 = 551.79 : x
  2. Step 2: Convert to fraction form
    1,705.23/2,558.21 = 551.79/x
  3. Step 3: Cross multiply
    1,705.23x = 2,558.21 × 551.79
  4. Step 4: Simplify right side
    1,705.23x = 1,411,591.94
  5. Step 5: Solve for x
    x = 1,411,591.94/1,705.23
  6. Step 6: Final answer
    x = 827.80

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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.