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Finding the Fourth Proportional to 590.70, 889 and 445.20

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Solution

The fourth proportional to 590.70, 889 and 445.20 is: 670.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    590.70 : 889 = 445.20 : x
  2. Step 2: Convert to fraction form
    590.70/889 = 445.20/x
  3. Step 3: Cross multiply
    590.70x = 889 × 445.20
  4. Step 4: Simplify right side
    590.70x = 395,782.80
  5. Step 5: Solve for x
    x = 395,782.80/590.70
  6. Step 6: Final answer
    x = 670.02

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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.