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Finding the Fourth Proportional to 561.10, 773.21 and 413.48

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Solution

The fourth proportional to 561.10, 773.21 and 413.48 is: 569.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.10 : 773.21 = 413.48 : x
  2. Step 2: Convert to fraction form
    561.10/773.21 = 413.48/x
  3. Step 3: Cross multiply
    561.10x = 773.21 × 413.48
  4. Step 4: Simplify right side
    561.10x = 319,703.00
  5. Step 5: Solve for x
    x = 319,703.00/561.10
  6. Step 6: Final answer
    x = 569.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.