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Finding the Fourth Proportional to 665,334.41, 918,170.25 and 378,855.64

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Solution

The fourth proportional to 665,334.41, 918,170.25 and 378,855.64 is: 522,825.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,334.41 : 918,170.25 = 378,855.64 : x
  2. Step 2: Convert to fraction form
    665,334.41/918,170.25 = 378,855.64/x
  3. Step 3: Cross multiply
    665,334.41x = 918,170.25 × 378,855.64
  4. Step 4: Simplify right side
    665,334.41x = 347,853,977,692.71
  5. Step 5: Solve for x
    x = 347,853,977,692.71/665,334.41
  6. Step 6: Final answer
    x = 522,825.77

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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.