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Finding the Fourth Proportional to 665,958.80, 918,920.04 and 379,490.96

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Solution

The fourth proportional to 665,958.80, 918,920.04 and 379,490.96 is: 523,638.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,958.80 : 918,920.04 = 379,490.96 : x
  2. Step 2: Convert to fraction form
    665,958.80/918,920.04 = 379,490.96/x
  3. Step 3: Cross multiply
    665,958.80x = 918,920.04 × 379,490.96
  4. Step 4: Simplify right side
    665,958.80x = 348,721,848,142.84
  5. Step 5: Solve for x
    x = 348,721,848,142.84/665,958.80
  6. Step 6: Final answer
    x = 523,638.77

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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.