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Finding the Fourth Proportional to 505,728.40, 758,592.60 and 443,520.40

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Solution

The fourth proportional to 505,728.40, 758,592.60 and 443,520.40 is: 665,280.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,728.40 : 758,592.60 = 443,520.40 : x
  2. Step 2: Convert to fraction form
    505,728.40/758,592.60 = 443,520.40/x
  3. Step 3: Cross multiply
    505,728.40x = 758,592.60 × 443,520.40
  4. Step 4: Simplify right side
    505,728.40x = 336,451,293,389.04
  5. Step 5: Solve for x
    x = 336,451,293,389.04/505,728.40
  6. Step 6: Final answer
    x = 665,280.60

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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.