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Finding the Fourth Proportional to 940.86, 1,413.45 and 654.12

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Solution

The fourth proportional to 940.86, 1,413.45 and 654.12 is: 982.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.86 : 1,413.45 = 654.12 : x
  2. Step 2: Convert to fraction form
    940.86/1,413.45 = 654.12/x
  3. Step 3: Cross multiply
    940.86x = 1,413.45 × 654.12
  4. Step 4: Simplify right side
    940.86x = 924,565.91
  5. Step 5: Solve for x
    x = 924,565.91/940.86
  6. Step 6: Final answer
    x = 982.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.