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Finding the Fourth Proportional to 736.03, 1,015.68 and 421.31

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Solution

The fourth proportional to 736.03, 1,015.68 and 421.31 is: 581.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    736.03 : 1,015.68 = 421.31 : x
  2. Step 2: Convert to fraction form
    736.03/1,015.68 = 421.31/x
  3. Step 3: Cross multiply
    736.03x = 1,015.68 × 421.31
  4. Step 4: Simplify right side
    736.03x = 427,914.87
  5. Step 5: Solve for x
    x = 427,914.87/736.03
  6. Step 6: Final answer
    x = 581.38

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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.