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Finding the Fourth Proportional to 927.05, 1,278.99 and 554.04

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Solution

The fourth proportional to 927.05, 1,278.99 and 554.04 is: 764.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.05 : 1,278.99 = 554.04 : x
  2. Step 2: Convert to fraction form
    927.05/1,278.99 = 554.04/x
  3. Step 3: Cross multiply
    927.05x = 1,278.99 × 554.04
  4. Step 4: Simplify right side
    927.05x = 708,611.62
  5. Step 5: Solve for x
    x = 708,611.62/927.05
  6. Step 6: Final answer
    x = 764.38

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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.