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Finding the Fourth Proportional to 520,115.10, 780,172.65 and 441,383.10

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Solution

The fourth proportional to 520,115.10, 780,172.65 and 441,383.10 is: 662,074.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,115.10 : 780,172.65 = 441,383.10 : x
  2. Step 2: Convert to fraction form
    520,115.10/780,172.65 = 441,383.10/x
  3. Step 3: Cross multiply
    520,115.10x = 780,172.65 × 441,383.10
  4. Step 4: Simplify right side
    520,115.10x = 344,355,022,792.22
  5. Step 5: Solve for x
    x = 344,355,022,792.22/520,115.10
  6. Step 6: Final answer
    x = 662,074.65

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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.