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Finding the Fourth Proportional to 685.08, 943.84 and 451.80

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Solution

The fourth proportional to 685.08, 943.84 and 451.80 is: 622.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.08 : 943.84 = 451.80 : x
  2. Step 2: Convert to fraction form
    685.08/943.84 = 451.80/x
  3. Step 3: Cross multiply
    685.08x = 943.84 × 451.80
  4. Step 4: Simplify right side
    685.08x = 426,426.91
  5. Step 5: Solve for x
    x = 426,426.91/685.08
  6. Step 6: Final answer
    x = 622.45

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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.