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Finding the Fourth Proportional to 667,664.28, 920,874.42 and 463,715.46

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Solution

The fourth proportional to 667,664.28, 920,874.42 and 463,715.46 is: 639,578.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,664.28 : 920,874.42 = 463,715.46 : x
  2. Step 2: Convert to fraction form
    667,664.28/920,874.42 = 463,715.46/x
  3. Step 3: Cross multiply
    667,664.28x = 920,874.42 × 463,715.46
  4. Step 4: Simplify right side
    667,664.28x = 427,023,705,272.53
  5. Step 5: Solve for x
    x = 427,023,705,272.53/667,664.28
  6. Step 6: Final answer
    x = 639,578.48

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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.