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Finding the Fourth Proportional to 590.80, 889.16 and 445.30

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Solution

The fourth proportional to 590.80, 889.16 and 445.30 is: 670.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    590.80 : 889.16 = 445.30 : x
  2. Step 2: Convert to fraction form
    590.80/889.16 = 445.30/x
  3. Step 3: Cross multiply
    590.80x = 889.16 × 445.30
  4. Step 4: Simplify right side
    590.80x = 395,942.95
  5. Step 5: Solve for x
    x = 395,942.95/590.80
  6. Step 6: Final answer
    x = 670.18

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.