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Finding the Fourth Proportional to 917.43, 1,267.09 and 622.19

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Solution

The fourth proportional to 917.43, 1,267.09 and 622.19 is: 859.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.43 : 1,267.09 = 622.19 : x
  2. Step 2: Convert to fraction form
    917.43/1,267.09 = 622.19/x
  3. Step 3: Cross multiply
    917.43x = 1,267.09 × 622.19
  4. Step 4: Simplify right side
    917.43x = 788,370.73
  5. Step 5: Solve for x
    x = 788,370.73/917.43
  6. Step 6: Final answer
    x = 859.33

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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.