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Finding the Fourth Proportional to 3,490.54, 5,235.79 and 893.47

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Solution

The fourth proportional to 3,490.54, 5,235.79 and 893.47 is: 1,340.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,490.54 : 5,235.79 = 893.47 : x
  2. Step 2: Convert to fraction form
    3,490.54/5,235.79 = 893.47/x
  3. Step 3: Cross multiply
    3,490.54x = 5,235.79 × 893.47
  4. Step 4: Simplify right side
    3,490.54x = 4,678,021.29
  5. Step 5: Solve for x
    x = 4,678,021.29/3,490.54
  6. Step 6: Final answer
    x = 1,340.20

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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.