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Finding the Fourth Proportional to 648.77, 971.73 and 404.78

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Solution

The fourth proportional to 648.77, 971.73 and 404.78 is: 606.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.77 : 971.73 = 404.78 : x
  2. Step 2: Convert to fraction form
    648.77/971.73 = 404.78/x
  3. Step 3: Cross multiply
    648.77x = 971.73 × 404.78
  4. Step 4: Simplify right side
    648.77x = 393,332.01
  5. Step 5: Solve for x
    x = 393,332.01/648.77
  6. Step 6: Final answer
    x = 606.28

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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.