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Finding the Fourth Proportional to 550.55, 821.90 and 503.16

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Solution

The fourth proportional to 550.55, 821.90 and 503.16 is: 751.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.55 : 821.90 = 503.16 : x
  2. Step 2: Convert to fraction form
    550.55/821.90 = 503.16/x
  3. Step 3: Cross multiply
    550.55x = 821.90 × 503.16
  4. Step 4: Simplify right side
    550.55x = 413,544.69
  5. Step 5: Solve for x
    x = 413,544.69/550.55
  6. Step 6: Final answer
    x = 751.16

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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.