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Finding the Fourth Proportional to 606.72, 905.67 and 561.63

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Solution

The fourth proportional to 606.72, 905.67 and 561.63 is: 838.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.72 : 905.67 = 561.63 : x
  2. Step 2: Convert to fraction form
    606.72/905.67 = 561.63/x
  3. Step 3: Cross multiply
    606.72x = 905.67 × 561.63
  4. Step 4: Simplify right side
    606.72x = 508,651.44
  5. Step 5: Solve for x
    x = 508,651.44/606.72
  6. Step 6: Final answer
    x = 838.36

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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.