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Finding the Fourth Proportional to 648.78, 895.26 and 354.03

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Solution

The fourth proportional to 648.78, 895.26 and 354.03 is: 488.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.78 : 895.26 = 354.03 : x
  2. Step 2: Convert to fraction form
    648.78/895.26 = 354.03/x
  3. Step 3: Cross multiply
    648.78x = 895.26 × 354.03
  4. Step 4: Simplify right side
    648.78x = 316,948.90
  5. Step 5: Solve for x
    x = 316,948.90/648.78
  6. Step 6: Final answer
    x = 488.53

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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.