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Finding the Fourth Proportional to 698.99, 1,049.16 and 260.68

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Solution

The fourth proportional to 698.99, 1,049.16 and 260.68 is: 391.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.99 : 1,049.16 = 260.68 : x
  2. Step 2: Convert to fraction form
    698.99/1,049.16 = 260.68/x
  3. Step 3: Cross multiply
    698.99x = 1,049.16 × 260.68
  4. Step 4: Simplify right side
    698.99x = 273,492.41
  5. Step 5: Solve for x
    x = 273,492.41/698.99
  6. Step 6: Final answer
    x = 391.27

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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.