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Finding the Fourth Proportional to 5,479.31, 7,612.45 and 5,413.70

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Solution

The fourth proportional to 5,479.31, 7,612.45 and 5,413.70 is: 7,521.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,479.31 : 7,612.45 = 5,413.70 : x
  2. Step 2: Convert to fraction form
    5,479.31/7,612.45 = 5,413.70/x
  3. Step 3: Cross multiply
    5,479.31x = 7,612.45 × 5,413.70
  4. Step 4: Simplify right side
    5,479.31x = 41,211,489.27
  5. Step 5: Solve for x
    x = 41,211,489.27/5,479.31
  6. Step 6: Final answer
    x = 7,521.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.