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Finding the Fourth Proportional to 2,157.08, 3,235.53 and 618.08

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Solution

The fourth proportional to 2,157.08, 3,235.53 and 618.08 is: 927.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.08 : 3,235.53 = 618.08 : x
  2. Step 2: Convert to fraction form
    2,157.08/3,235.53 = 618.08/x
  3. Step 3: Cross multiply
    2,157.08x = 3,235.53 × 618.08
  4. Step 4: Simplify right side
    2,157.08x = 1,999,816.38
  5. Step 5: Solve for x
    x = 1,999,816.38/2,157.08
  6. Step 6: Final answer
    x = 927.09

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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.