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Finding the Fourth Proportional to 606.63, 909.75 and 411.51

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Solution

The fourth proportional to 606.63, 909.75 and 411.51 is: 617.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.63 : 909.75 = 411.51 : x
  2. Step 2: Convert to fraction form
    606.63/909.75 = 411.51/x
  3. Step 3: Cross multiply
    606.63x = 909.75 × 411.51
  4. Step 4: Simplify right side
    606.63x = 374,371.22
  5. Step 5: Solve for x
    x = 374,371.22/606.63
  6. Step 6: Final answer
    x = 617.13

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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.