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Finding the Fourth Proportional to 673.69, 928.64 and 617.19

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Solution

The fourth proportional to 673.69, 928.64 and 617.19 is: 850.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.69 : 928.64 = 617.19 : x
  2. Step 2: Convert to fraction form
    673.69/928.64 = 617.19/x
  3. Step 3: Cross multiply
    673.69x = 928.64 × 617.19
  4. Step 4: Simplify right side
    673.69x = 573,147.72
  5. Step 5: Solve for x
    x = 573,147.72/673.69
  6. Step 6: Final answer
    x = 850.76

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Double scale
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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.