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Finding the Fourth Proportional to 665,917.32, 918,741.03 and 379,234.42

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Solution

The fourth proportional to 665,917.32, 918,741.03 and 379,234.42 is: 523,215.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,917.32 : 918,741.03 = 379,234.42 : x
  2. Step 2: Convert to fraction form
    665,917.32/918,741.03 = 379,234.42/x
  3. Step 3: Cross multiply
    665,917.32x = 918,741.03 × 379,234.42
  4. Step 4: Simplify right side
    665,917.32x = 348,418,225,224.38
  5. Step 5: Solve for x
    x = 348,418,225,224.38/665,917.32
  6. Step 6: Final answer
    x = 523,215.44

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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.