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Finding the Fourth Proportional to 683.10, 942.74 and 388.38

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Solution

The fourth proportional to 683.10, 942.74 and 388.38 is: 536.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.10 : 942.74 = 388.38 : x
  2. Step 2: Convert to fraction form
    683.10/942.74 = 388.38/x
  3. Step 3: Cross multiply
    683.10x = 942.74 × 388.38
  4. Step 4: Simplify right side
    683.10x = 366,139.42
  5. Step 5: Solve for x
    x = 366,139.42/683.10
  6. Step 6: Final answer
    x = 536.00

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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.