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Finding the Fourth Proportional to 550.48, 822.08 and 490

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Solution

The fourth proportional to 550.48, 822.08 and 490 is: 731.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.48 : 822.08 = 490 : x
  2. Step 2: Convert to fraction form
    550.48/822.08 = 490/x
  3. Step 3: Cross multiply
    550.48x = 822.08 × 490
  4. Step 4: Simplify right side
    550.48x = 402,819.20
  5. Step 5: Solve for x
    x = 402,819.20/550.48
  6. Step 6: Final answer
    x = 731.76

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.