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Finding the Fourth Proportional to 326,187.15, 489,405.27 and 126,647.64

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Solution

The fourth proportional to 326,187.15, 489,405.27 and 126,647.64 is: 190,019.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,187.15 : 489,405.27 = 126,647.64 : x
  2. Step 2: Convert to fraction form
    326,187.15/489,405.27 = 126,647.64/x
  3. Step 3: Cross multiply
    326,187.15x = 489,405.27 × 126,647.64
  4. Step 4: Simplify right side
    326,187.15x = 61,982,022,449.06
  5. Step 5: Solve for x
    x = 61,982,022,449.06/326,187.15
  6. Step 6: Final answer
    x = 190,019.82

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1.5x scale

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.