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Finding the Fourth Proportional to 413.72, 570.62 and 388.52

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Solution

The fourth proportional to 413.72, 570.62 and 388.52 is: 535.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.72 : 570.62 = 388.52 : x
  2. Step 2: Convert to fraction form
    413.72/570.62 = 388.52/x
  3. Step 3: Cross multiply
    413.72x = 570.62 × 388.52
  4. Step 4: Simplify right side
    413.72x = 221,697.28
  5. Step 5: Solve for x
    x = 221,697.28/413.72
  6. Step 6: Final answer
    x = 535.86

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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.