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Finding the Fourth Proportional to 326,740.80, 489,422.28 and 149,396.97

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Solution

The fourth proportional to 326,740.80, 489,422.28 and 149,396.97 is: 223,780.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,740.80 : 489,422.28 = 149,396.97 : x
  2. Step 2: Convert to fraction form
    326,740.80/489,422.28 = 149,396.97/x
  3. Step 3: Cross multiply
    326,740.80x = 489,422.28 × 149,396.97
  4. Step 4: Simplify right side
    326,740.80x = 73,118,205,682.49
  5. Step 5: Solve for x
    x = 73,118,205,682.49/326,740.80
  6. Step 6: Final answer
    x = 223,780.46

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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.