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Finding the Fourth Proportional to 683.49, 941.28 and 621.99

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Solution

The fourth proportional to 683.49, 941.28 and 621.99 is: 856.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.49 : 941.28 = 621.99 : x
  2. Step 2: Convert to fraction form
    683.49/941.28 = 621.99/x
  3. Step 3: Cross multiply
    683.49x = 941.28 × 621.99
  4. Step 4: Simplify right side
    683.49x = 585,466.75
  5. Step 5: Solve for x
    x = 585,466.75/683.49
  6. Step 6: Final answer
    x = 856.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.