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Finding the Fourth Proportional to 1,445, 1,994.46 and 824.36

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Solution

The fourth proportional to 1,445, 1,994.46 and 824.36 is: 1,137.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,445 : 1,994.46 = 824.36 : x
  2. Step 2: Convert to fraction form
    1,445/1,994.46 = 824.36/x
  3. Step 3: Cross multiply
    1,445x = 1,994.46 × 824.36
  4. Step 4: Simplify right side
    1,445x = 1,644,153.05
  5. Step 5: Solve for x
    x = 1,644,153.05/1,445
  6. Step 6: Final answer
    x = 1,137.82

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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.