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Finding the Fourth Proportional to 561.23, 840.23 and 445.84

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Solution

The fourth proportional to 561.23, 840.23 and 445.84 is: 667.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.23 : 840.23 = 445.84 : x
  2. Step 2: Convert to fraction form
    561.23/840.23 = 445.84/x
  3. Step 3: Cross multiply
    561.23x = 840.23 × 445.84
  4. Step 4: Simplify right side
    561.23x = 374,607.16
  5. Step 5: Solve for x
    x = 374,607.16/561.23
  6. Step 6: Final answer
    x = 667.48

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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.