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Finding the Fourth Proportional to 427.49, 589.63 and 413.20

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Solution

The fourth proportional to 427.49, 589.63 and 413.20 is: 569.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.49 : 589.63 = 413.20 : x
  2. Step 2: Convert to fraction form
    427.49/589.63 = 413.20/x
  3. Step 3: Cross multiply
    427.49x = 589.63 × 413.20
  4. Step 4: Simplify right side
    427.49x = 243,632.61
  5. Step 5: Solve for x
    x = 243,632.61/427.49
  6. Step 6: Final answer
    x = 569.92

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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.