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Finding the Fourth Proportional to 661,266.80, 991,900.20 and 329,490.80

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Solution

The fourth proportional to 661,266.80, 991,900.20 and 329,490.80 is: 494,236.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,266.80 : 991,900.20 = 329,490.80 : x
  2. Step 2: Convert to fraction form
    661,266.80/991,900.20 = 329,490.80/x
  3. Step 3: Cross multiply
    661,266.80x = 991,900.20 × 329,490.80
  4. Step 4: Simplify right side
    661,266.80x = 326,821,990,418.16
  5. Step 5: Solve for x
    x = 326,821,990,418.16/661,266.80
  6. Step 6: Final answer
    x = 494,236.20

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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.