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Finding the Fourth Proportional to 883.19, 1,220.47 and 673.20

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Solution

The fourth proportional to 883.19, 1,220.47 and 673.20 is: 930.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.19 : 1,220.47 = 673.20 : x
  2. Step 2: Convert to fraction form
    883.19/1,220.47 = 673.20/x
  3. Step 3: Cross multiply
    883.19x = 1,220.47 × 673.20
  4. Step 4: Simplify right side
    883.19x = 821,618.72
  5. Step 5: Solve for x
    x = 821,618.72/883.19
  6. Step 6: Final answer
    x = 930.28

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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.