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Finding the Fourth Proportional to 550.74, 824.55 and 290.15

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Solution

The fourth proportional to 550.74, 824.55 and 290.15 is: 434.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.74 : 824.55 = 290.15 : x
  2. Step 2: Convert to fraction form
    550.74/824.55 = 290.15/x
  3. Step 3: Cross multiply
    550.74x = 824.55 × 290.15
  4. Step 4: Simplify right side
    550.74x = 239,243.18
  5. Step 5: Solve for x
    x = 239,243.18/550.74
  6. Step 6: Final answer
    x = 434.40

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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.