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Finding the Fourth Proportional to 997.42, 1,376.46 and 555.37

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Solution

The fourth proportional to 997.42, 1,376.46 and 555.37 is: 766.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    997.42 : 1,376.46 = 555.37 : x
  2. Step 2: Convert to fraction form
    997.42/1,376.46 = 555.37/x
  3. Step 3: Cross multiply
    997.42x = 1,376.46 × 555.37
  4. Step 4: Simplify right side
    997.42x = 764,444.59
  5. Step 5: Solve for x
    x = 764,444.59/997.42
  6. Step 6: Final answer
    x = 766.42

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Double scale
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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.