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Finding the Fourth Proportional to 683.34, 943.03 and 388.65

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Solution

The fourth proportional to 683.34, 943.03 and 388.65 is: 536.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.34 : 943.03 = 388.65 : x
  2. Step 2: Convert to fraction form
    683.34/943.03 = 388.65/x
  3. Step 3: Cross multiply
    683.34x = 943.03 × 388.65
  4. Step 4: Simplify right side
    683.34x = 366,508.61
  5. Step 5: Solve for x
    x = 366,508.61/683.34
  6. Step 6: Final answer
    x = 536.35

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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.