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Finding the Fourth Proportional to 326,657.80, 489,986.70 and 274,169.80

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Solution

The fourth proportional to 326,657.80, 489,986.70 and 274,169.80 is: 411,254.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,657.80 : 489,986.70 = 274,169.80 : x
  2. Step 2: Convert to fraction form
    326,657.80/489,986.70 = 274,169.80/x
  3. Step 3: Cross multiply
    326,657.80x = 489,986.70 × 274,169.80
  4. Step 4: Simplify right side
    326,657.80x = 134,339,555,541.66
  5. Step 5: Solve for x
    x = 134,339,555,541.66/326,657.80
  6. Step 6: Final answer
    x = 411,254.70

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Similar ratio
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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.