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Finding the Fourth Proportional to 665,765.82, 918,690.93 and 379,268.82

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Solution

The fourth proportional to 665,765.82, 918,690.93 and 379,268.82 is: 523,353.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,765.82 : 918,690.93 = 379,268.82 : x
  2. Step 2: Convert to fraction form
    665,765.82/918,690.93 = 379,268.82/x
  3. Step 3: Cross multiply
    665,765.82x = 918,690.93 × 379,268.82
  4. Step 4: Simplify right side
    665,765.82x = 348,430,824,965.80
  5. Step 5: Solve for x
    x = 348,430,824,965.80/665,765.82
  6. Step 6: Final answer
    x = 523,353.43

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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.