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Finding the Fourth Proportional to 646.02, 891.81 and 413.28

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Solution

The fourth proportional to 646.02, 891.81 and 413.28 is: 570.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.02 : 891.81 = 413.28 : x
  2. Step 2: Convert to fraction form
    646.02/891.81 = 413.28/x
  3. Step 3: Cross multiply
    646.02x = 891.81 × 413.28
  4. Step 4: Simplify right side
    646.02x = 368,567.24
  5. Step 5: Solve for x
    x = 368,567.24/646.02
  6. Step 6: Final answer
    x = 570.52

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.