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Finding the Fourth Proportional to 648.35, 972.76 and 404.60

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Solution

The fourth proportional to 648.35, 972.76 and 404.60 is: 607.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.35 : 972.76 = 404.60 : x
  2. Step 2: Convert to fraction form
    648.35/972.76 = 404.60/x
  3. Step 3: Cross multiply
    648.35x = 972.76 × 404.60
  4. Step 4: Simplify right side
    648.35x = 393,573.58
  5. Step 5: Solve for x
    x = 393,573.58/648.35
  6. Step 6: Final answer
    x = 607.03

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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.