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Finding the Fourth Proportional to 675, 931.61 and 413.18

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Solution

The fourth proportional to 675, 931.61 and 413.18 is: 570.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    675 : 931.61 = 413.18 : x
  2. Step 2: Convert to fraction form
    675/931.61 = 413.18/x
  3. Step 3: Cross multiply
    675x = 931.61 × 413.18
  4. Step 4: Simplify right side
    675x = 384,915.90
  5. Step 5: Solve for x
    x = 384,915.90/675
  6. Step 6: Final answer
    x = 570.25

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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.