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Finding the Fourth Proportional to 684.55, 943.89 and 669.46

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Solution

The fourth proportional to 684.55, 943.89 and 669.46 is: 923.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.55 : 943.89 = 669.46 : x
  2. Step 2: Convert to fraction form
    684.55/943.89 = 669.46/x
  3. Step 3: Cross multiply
    684.55x = 943.89 × 669.46
  4. Step 4: Simplify right side
    684.55x = 631,896.60
  5. Step 5: Solve for x
    x = 631,896.60/684.55
  6. Step 6: Final answer
    x = 923.08

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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.