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Finding the Fourth Proportional to 550.04, 823.98 and 421.16

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Solution

The fourth proportional to 550.04, 823.98 and 421.16 is: 630.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.04 : 823.98 = 421.16 : x
  2. Step 2: Convert to fraction form
    550.04/823.98 = 421.16/x
  3. Step 3: Cross multiply
    550.04x = 823.98 × 421.16
  4. Step 4: Simplify right side
    550.04x = 347,027.42
  5. Step 5: Solve for x
    x = 347,027.42/550.04
  6. Step 6: Final answer
    x = 630.91

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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.