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Finding the Fourth Proportional to 667,620.55, 920,813.83 and 463,671.87

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Solution

The fourth proportional to 667,620.55, 920,813.83 and 463,671.87 is: 639,518.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,620.55 : 920,813.83 = 463,671.87 : x
  2. Step 2: Convert to fraction form
    667,620.55/920,813.83 = 463,671.87/x
  3. Step 3: Cross multiply
    667,620.55x = 920,813.83 × 463,671.87
  4. Step 4: Simplify right side
    667,620.55x = 426,955,470,477.96
  5. Step 5: Solve for x
    x = 426,955,470,477.96/667,620.55
  6. Step 6: Final answer
    x = 639,518.17

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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.