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Finding the Fourth Proportional to 2,329.18, 3,493.76 and 685.72

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Solution

The fourth proportional to 2,329.18, 3,493.76 and 685.72 is: 1,028.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,329.18 : 3,493.76 = 685.72 : x
  2. Step 2: Convert to fraction form
    2,329.18/3,493.76 = 685.72/x
  3. Step 3: Cross multiply
    2,329.18x = 3,493.76 × 685.72
  4. Step 4: Simplify right side
    2,329.18x = 2,395,728.94
  5. Step 5: Solve for x
    x = 2,395,728.94/2,329.18
  6. Step 6: Final answer
    x = 1,028.57

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1.5x scale

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.