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Finding the Fourth Proportional to 667,105.58, 920,744.70 and 613,305.38

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Solution

The fourth proportional to 667,105.58, 920,744.70 and 613,305.38 is: 846,489.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,105.58 : 920,744.70 = 613,305.38 : x
  2. Step 2: Convert to fraction form
    667,105.58/920,744.70 = 613,305.38/x
  3. Step 3: Cross multiply
    667,105.58x = 920,744.70 × 613,305.38
  4. Step 4: Simplify right side
    667,105.58x = 564,697,678,116.49
  5. Step 5: Solve for x
    x = 564,697,678,116.49/667,105.58
  6. Step 6: Final answer
    x = 846,489.21

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.