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Finding the Fourth Proportional to 909.82, 1,357.20 and 897.94

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Solution

The fourth proportional to 909.82, 1,357.20 and 897.94 is: 1,339.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.82 : 1,357.20 = 897.94 : x
  2. Step 2: Convert to fraction form
    909.82/1,357.20 = 897.94/x
  3. Step 3: Cross multiply
    909.82x = 1,357.20 × 897.94
  4. Step 4: Simplify right side
    909.82x = 1,218,684.17
  5. Step 5: Solve for x
    x = 1,218,684.17/909.82
  6. Step 6: Final answer
    x = 1,339.48

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.