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Finding the Fourth Proportional to 896.21, 1,343.36 and 485.22

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Solution

The fourth proportional to 896.21, 1,343.36 and 485.22 is: 727.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.21 : 1,343.36 = 485.22 : x
  2. Step 2: Convert to fraction form
    896.21/1,343.36 = 485.22/x
  3. Step 3: Cross multiply
    896.21x = 1,343.36 × 485.22
  4. Step 4: Simplify right side
    896.21x = 651,822.71
  5. Step 5: Solve for x
    x = 651,822.71/896.21
  6. Step 6: Final answer
    x = 727.31

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Double scale
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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.