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Finding the Fourth Proportional to 884.20, 1,218.90 and 663.16

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Solution

The fourth proportional to 884.20, 1,218.90 and 663.16 is: 914.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.20 : 1,218.90 = 663.16 : x
  2. Step 2: Convert to fraction form
    884.20/1,218.90 = 663.16/x
  3. Step 3: Cross multiply
    884.20x = 1,218.90 × 663.16
  4. Step 4: Simplify right side
    884.20x = 808,325.72
  5. Step 5: Solve for x
    x = 808,325.72/884.20
  6. Step 6: Final answer
    x = 914.19

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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.