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Finding the Fourth Proportional to 2,391.85, 3,587.99 and 660.48

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Solution

The fourth proportional to 2,391.85, 3,587.99 and 660.48 is: 990.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,391.85 : 3,587.99 = 660.48 : x
  2. Step 2: Convert to fraction form
    2,391.85/3,587.99 = 660.48/x
  3. Step 3: Cross multiply
    2,391.85x = 3,587.99 × 660.48
  4. Step 4: Simplify right side
    2,391.85x = 2,369,783.36
  5. Step 5: Solve for x
    x = 2,369,783.36/2,391.85
  6. Step 6: Final answer
    x = 990.77

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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.