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Finding the Fourth Proportional to 948.86, 1,422.90 and 559.64

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Solution

The fourth proportional to 948.86, 1,422.90 and 559.64 is: 839.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.86 : 1,422.90 = 559.64 : x
  2. Step 2: Convert to fraction form
    948.86/1,422.90 = 559.64/x
  3. Step 3: Cross multiply
    948.86x = 1,422.90 × 559.64
  4. Step 4: Simplify right side
    948.86x = 796,311.76
  5. Step 5: Solve for x
    x = 796,311.76/948.86
  6. Step 6: Final answer
    x = 839.23

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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.