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Finding the Fourth Proportional to 665,535.12, 918,601.74 and 379,224.42

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Solution

The fourth proportional to 665,535.12, 918,601.74 and 379,224.42 is: 523,422.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,535.12 : 918,601.74 = 379,224.42 : x
  2. Step 2: Convert to fraction form
    665,535.12/918,601.74 = 379,224.42/x
  3. Step 3: Cross multiply
    665,535.12x = 918,601.74 × 379,224.42
  4. Step 4: Simplify right side
    665,535.12x = 348,356,212,062.49
  5. Step 5: Solve for x
    x = 348,356,212,062.49/665,535.12
  6. Step 6: Final answer
    x = 523,422.73

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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.