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Finding the Fourth Proportional to 1,239.92, 1,855.01 and 893.91

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Solution

The fourth proportional to 1,239.92, 1,855.01 and 893.91 is: 1,337.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.92 : 1,855.01 = 893.91 : x
  2. Step 2: Convert to fraction form
    1,239.92/1,855.01 = 893.91/x
  3. Step 3: Cross multiply
    1,239.92x = 1,855.01 × 893.91
  4. Step 4: Simplify right side
    1,239.92x = 1,658,214.22
  5. Step 5: Solve for x
    x = 1,658,214.22/1,239.92
  6. Step 6: Final answer
    x = 1,337.36

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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.