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Finding the Fourth Proportional to 735.11, 1,014.42 and 420.39

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Solution

The fourth proportional to 735.11, 1,014.42 and 420.39 is: 580.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    735.11 : 1,014.42 = 420.39 : x
  2. Step 2: Convert to fraction form
    735.11/1,014.42 = 420.39/x
  3. Step 3: Cross multiply
    735.11x = 1,014.42 × 420.39
  4. Step 4: Simplify right side
    735.11x = 426,452.02
  5. Step 5: Solve for x
    x = 426,452.02/735.11
  6. Step 6: Final answer
    x = 580.12

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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.