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Finding the Fourth Proportional to 883.91, 1,325.57 and 422.21

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Solution

The fourth proportional to 883.91, 1,325.57 and 422.21 is: 633.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.91 : 1,325.57 = 422.21 : x
  2. Step 2: Convert to fraction form
    883.91/1,325.57 = 422.21/x
  3. Step 3: Cross multiply
    883.91x = 1,325.57 × 422.21
  4. Step 4: Simplify right side
    883.91x = 559,670.11
  5. Step 5: Solve for x
    x = 559,670.11/883.91
  6. Step 6: Final answer
    x = 633.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.