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Finding the Fourth Proportional to 648.63, 895.10 and 353.89

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Solution

The fourth proportional to 648.63, 895.10 and 353.89 is: 488.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.63 : 895.10 = 353.89 : x
  2. Step 2: Convert to fraction form
    648.63/895.10 = 353.89/x
  3. Step 3: Cross multiply
    648.63x = 895.10 × 353.89
  4. Step 4: Simplify right side
    648.63x = 316,766.94
  5. Step 5: Solve for x
    x = 316,766.94/648.63
  6. Step 6: Final answer
    x = 488.36

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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.