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Finding the Fourth Proportional to 881.42, 1,216.42 and 488.43

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Solution

The fourth proportional to 881.42, 1,216.42 and 488.43 is: 674.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.42 : 1,216.42 = 488.43 : x
  2. Step 2: Convert to fraction form
    881.42/1,216.42 = 488.43/x
  3. Step 3: Cross multiply
    881.42x = 1,216.42 × 488.43
  4. Step 4: Simplify right side
    881.42x = 594,136.02
  5. Step 5: Solve for x
    x = 594,136.02/881.42
  6. Step 6: Final answer
    x = 674.07

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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.