Home / 280,021.12-386,413.94-159,145.63

Finding the Fourth Proportional to 280,021.12, 386,413.94 and 159,145.63

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Solution

The fourth proportional to 280,021.12, 386,413.94 and 159,145.63 is: 219,612.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,021.12 : 386,413.94 = 159,145.63 : x
  2. Step 2: Convert to fraction form
    280,021.12/386,413.94 = 159,145.63/x
  3. Step 3: Cross multiply
    280,021.12x = 386,413.94 × 159,145.63
  4. Step 4: Simplify right side
    280,021.12x = 61,496,089,353.91
  5. Step 5: Solve for x
    x = 61,496,089,353.91/280,021.12
  6. Step 6: Final answer
    x = 219,612.33

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1.5x scale

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.