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Finding the Fourth Proportional to 648.32, 894.64 and 353.58

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Solution

The fourth proportional to 648.32, 894.64 and 353.58 is: 487.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.32 : 894.64 = 353.58 : x
  2. Step 2: Convert to fraction form
    648.32/894.64 = 353.58/x
  3. Step 3: Cross multiply
    648.32x = 894.64 × 353.58
  4. Step 4: Simplify right side
    648.32x = 316,326.81
  5. Step 5: Solve for x
    x = 316,326.81/648.32
  6. Step 6: Final answer
    x = 487.92

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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.