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Finding the Fourth Proportional to 553.54, 829.55 and 260.99

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Solution

The fourth proportional to 553.54, 829.55 and 260.99 is: 391.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.54 : 829.55 = 260.99 : x
  2. Step 2: Convert to fraction form
    553.54/829.55 = 260.99/x
  3. Step 3: Cross multiply
    553.54x = 829.55 × 260.99
  4. Step 4: Simplify right side
    553.54x = 216,506.98
  5. Step 5: Solve for x
    x = 216,506.98/553.54
  6. Step 6: Final answer
    x = 391.13

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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.