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Finding the Fourth Proportional to 1,161.91, 1,603.63 and 896.74

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Solution

The fourth proportional to 1,161.91, 1,603.63 and 896.74 is: 1,237.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,161.91 : 1,603.63 = 896.74 : x
  2. Step 2: Convert to fraction form
    1,161.91/1,603.63 = 896.74/x
  3. Step 3: Cross multiply
    1,161.91x = 1,603.63 × 896.74
  4. Step 4: Simplify right side
    1,161.91x = 1,438,031.23
  5. Step 5: Solve for x
    x = 1,438,031.23/1,161.91
  6. Step 6: Final answer
    x = 1,237.64

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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.