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Finding the Fourth Proportional to 741.30, 1,111.58 and 433.22

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Solution

The fourth proportional to 741.30, 1,111.58 and 433.22 is: 649.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.30 : 1,111.58 = 433.22 : x
  2. Step 2: Convert to fraction form
    741.30/1,111.58 = 433.22/x
  3. Step 3: Cross multiply
    741.30x = 1,111.58 × 433.22
  4. Step 4: Simplify right side
    741.30x = 481,558.69
  5. Step 5: Solve for x
    x = 481,558.69/741.30
  6. Step 6: Final answer
    x = 649.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.