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Finding the Fourth Proportional to 648.15, 892.94 and 451.32

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Solution

The fourth proportional to 648.15, 892.94 and 451.32 is: 621.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.15 : 892.94 = 451.32 : x
  2. Step 2: Convert to fraction form
    648.15/892.94 = 451.32/x
  3. Step 3: Cross multiply
    648.15x = 892.94 × 451.32
  4. Step 4: Simplify right side
    648.15x = 402,999.42
  5. Step 5: Solve for x
    x = 402,999.42/648.15
  6. Step 6: Final answer
    x = 621.77

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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.