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Finding the Fourth Proportional to 735.87, 1,015.47 and 421.05

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Solution

The fourth proportional to 735.87, 1,015.47 and 421.05 is: 581.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    735.87 : 1,015.47 = 421.05 : x
  2. Step 2: Convert to fraction form
    735.87/1,015.47 = 421.05/x
  3. Step 3: Cross multiply
    735.87x = 1,015.47 × 421.05
  4. Step 4: Simplify right side
    735.87x = 427,563.64
  5. Step 5: Solve for x
    x = 427,563.64/735.87
  6. Step 6: Final answer
    x = 581.03

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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.