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Finding the Fourth Proportional to 440.24, 661.57 and 413.51

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Solution

The fourth proportional to 440.24, 661.57 and 413.51 is: 621.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.24 : 661.57 = 413.51 : x
  2. Step 2: Convert to fraction form
    440.24/661.57 = 413.51/x
  3. Step 3: Cross multiply
    440.24x = 661.57 × 413.51
  4. Step 4: Simplify right side
    440.24x = 273,561.47
  5. Step 5: Solve for x
    x = 273,561.47/440.24
  6. Step 6: Final answer
    x = 621.40

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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.