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Finding the Fourth Proportional to 668.63, 998.88 and 559.28

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Solution

The fourth proportional to 668.63, 998.88 and 559.28 is: 835.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.63 : 998.88 = 559.28 : x
  2. Step 2: Convert to fraction form
    668.63/998.88 = 559.28/x
  3. Step 3: Cross multiply
    668.63x = 998.88 × 559.28
  4. Step 4: Simplify right side
    668.63x = 558,648.61
  5. Step 5: Solve for x
    x = 558,648.61/668.63
  6. Step 6: Final answer
    x = 835.52

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.