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Finding the Fourth Proportional to 505,874.70, 758,812.05 and 393,900.30

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Solution

The fourth proportional to 505,874.70, 758,812.05 and 393,900.30 is: 590,850.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,874.70 : 758,812.05 = 393,900.30 : x
  2. Step 2: Convert to fraction form
    505,874.70/758,812.05 = 393,900.30/x
  3. Step 3: Cross multiply
    505,874.70x = 758,812.05 × 393,900.30
  4. Step 4: Simplify right side
    505,874.70x = 298,896,294,138.62
  5. Step 5: Solve for x
    x = 298,896,294,138.62/505,874.70
  6. Step 6: Final answer
    x = 590,850.45

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Half scale
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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.