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Finding the Fourth Proportional to 941.68, 1,413.40 and 479.80

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Solution

The fourth proportional to 941.68, 1,413.40 and 479.80 is: 720.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.68 : 1,413.40 = 479.80 : x
  2. Step 2: Convert to fraction form
    941.68/1,413.40 = 479.80/x
  3. Step 3: Cross multiply
    941.68x = 1,413.40 × 479.80
  4. Step 4: Simplify right side
    941.68x = 678,149.32
  5. Step 5: Solve for x
    x = 678,149.32/941.68
  6. Step 6: Final answer
    x = 720.15

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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.