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Finding the Fourth Proportional to 646.09, 891.90 and 413.35

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Solution

The fourth proportional to 646.09, 891.90 and 413.35 is: 570.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.09 : 891.90 = 413.35 : x
  2. Step 2: Convert to fraction form
    646.09/891.90 = 413.35/x
  3. Step 3: Cross multiply
    646.09x = 891.90 × 413.35
  4. Step 4: Simplify right side
    646.09x = 368,662.41
  5. Step 5: Solve for x
    x = 368,662.41/646.09
  6. Step 6: Final answer
    x = 570.61

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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.