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Finding the Fourth Proportional to 684.56, 944.72 and 404.80

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Solution

The fourth proportional to 684.56, 944.72 and 404.80 is: 558.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.56 : 944.72 = 404.80 : x
  2. Step 2: Convert to fraction form
    684.56/944.72 = 404.80/x
  3. Step 3: Cross multiply
    684.56x = 944.72 × 404.80
  4. Step 4: Simplify right side
    684.56x = 382,422.66
  5. Step 5: Solve for x
    x = 382,422.66/684.56
  6. Step 6: Final answer
    x = 558.64

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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.