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Finding the Fourth Proportional to 645,937.40, 968,906.10 and 505,815.80

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Solution

The fourth proportional to 645,937.40, 968,906.10 and 505,815.80 is: 758,723.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,937.40 : 968,906.10 = 505,815.80 : x
  2. Step 2: Convert to fraction form
    645,937.40/968,906.10 = 505,815.80/x
  3. Step 3: Cross multiply
    645,937.40x = 968,906.10 × 505,815.80
  4. Step 4: Simplify right side
    645,937.40x = 490,088,014,096.38
  5. Step 5: Solve for x
    x = 490,088,014,096.38/645,937.40
  6. Step 6: Final answer
    x = 758,723.70

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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.