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Finding the Fourth Proportional to 1,605.79, 2,408.88 and 551.80

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Solution

The fourth proportional to 1,605.79, 2,408.88 and 551.80 is: 827.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605.79 : 2,408.88 = 551.80 : x
  2. Step 2: Convert to fraction form
    1,605.79/2,408.88 = 551.80/x
  3. Step 3: Cross multiply
    1,605.79x = 2,408.88 × 551.80
  4. Step 4: Simplify right side
    1,605.79x = 1,329,217.23
  5. Step 5: Solve for x
    x = 1,329,217.23/1,605.79
  6. Step 6: Final answer
    x = 827.77

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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.