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Finding the Fourth Proportional to 660,010.80, 990,016.20 and 328,234.80

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Solution

The fourth proportional to 660,010.80, 990,016.20 and 328,234.80 is: 492,352.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,010.80 : 990,016.20 = 328,234.80 : x
  2. Step 2: Convert to fraction form
    660,010.80/990,016.20 = 328,234.80/x
  3. Step 3: Cross multiply
    660,010.80x = 990,016.20 × 328,234.80
  4. Step 4: Simplify right side
    660,010.80x = 324,957,769,403.76
  5. Step 5: Solve for x
    x = 324,957,769,403.76/660,010.80
  6. Step 6: Final answer
    x = 492,352.20

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Double scale
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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.