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Finding the Fourth Proportional to 883.79, 1,219.91 and 622.57

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Solution

The fourth proportional to 883.79, 1,219.91 and 622.57 is: 859.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.79 : 1,219.91 = 622.57 : x
  2. Step 2: Convert to fraction form
    883.79/1,219.91 = 622.57/x
  3. Step 3: Cross multiply
    883.79x = 1,219.91 × 622.57
  4. Step 4: Simplify right side
    883.79x = 759,479.37
  5. Step 5: Solve for x
    x = 759,479.37/883.79
  6. Step 6: Final answer
    x = 859.34

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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.