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Finding the Fourth Proportional to 792.70, 1,093.94 and 438.63

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Solution

The fourth proportional to 792.70, 1,093.94 and 438.63 is: 605.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.70 : 1,093.94 = 438.63 : x
  2. Step 2: Convert to fraction form
    792.70/1,093.94 = 438.63/x
  3. Step 3: Cross multiply
    792.70x = 1,093.94 × 438.63
  4. Step 4: Simplify right side
    792.70x = 479,836.41
  5. Step 5: Solve for x
    x = 479,836.41/792.70
  6. Step 6: Final answer
    x = 605.32

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1.5x scale

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.