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Finding the Fourth Proportional to 645.02, 889.95 and 365.26

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Solution

The fourth proportional to 645.02, 889.95 and 365.26 is: 503.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.02 : 889.95 = 365.26 : x
  2. Step 2: Convert to fraction form
    645.02/889.95 = 365.26/x
  3. Step 3: Cross multiply
    645.02x = 889.95 × 365.26
  4. Step 4: Simplify right side
    645.02x = 325,063.14
  5. Step 5: Solve for x
    x = 325,063.14/645.02
  6. Step 6: Final answer
    x = 503.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.