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Finding the Fourth Proportional to 665,703.44, 918,446.40 and 379,020.72

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Solution

The fourth proportional to 665,703.44, 918,446.40 and 379,020.72 is: 522,920.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,703.44 : 918,446.40 = 379,020.72 : x
  2. Step 2: Convert to fraction form
    665,703.44/918,446.40 = 379,020.72/x
  3. Step 3: Cross multiply
    665,703.44x = 918,446.40 × 379,020.72
  4. Step 4: Simplify right side
    665,703.44x = 348,110,215,809.41
  5. Step 5: Solve for x
    x = 348,110,215,809.41/665,703.44
  6. Step 6: Final answer
    x = 522,920.86

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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.