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Finding the Fourth Proportional to 896.63, 1,238.09 and 711.07

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Solution

The fourth proportional to 896.63, 1,238.09 and 711.07 is: 981.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.63 : 1,238.09 = 711.07 : x
  2. Step 2: Convert to fraction form
    896.63/1,238.09 = 711.07/x
  3. Step 3: Cross multiply
    896.63x = 1,238.09 × 711.07
  4. Step 4: Simplify right side
    896.63x = 880,362.01
  5. Step 5: Solve for x
    x = 880,362.01/896.63
  6. Step 6: Final answer
    x = 981.86

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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.