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Finding the Fourth Proportional to 742.74, 1,025.08 and 427.94

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Solution

The fourth proportional to 742.74, 1,025.08 and 427.94 is: 590.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.74 : 1,025.08 = 427.94 : x
  2. Step 2: Convert to fraction form
    742.74/1,025.08 = 427.94/x
  3. Step 3: Cross multiply
    742.74x = 1,025.08 × 427.94
  4. Step 4: Simplify right side
    742.74x = 438,672.55
  5. Step 5: Solve for x
    x = 438,672.55/742.74
  6. Step 6: Final answer
    x = 590.62

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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.