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Finding the Fourth Proportional to 670.36, 996.32 and 618.52

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Solution

The fourth proportional to 670.36, 996.32 and 618.52 is: 919.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.36 : 996.32 = 618.52 : x
  2. Step 2: Convert to fraction form
    670.36/996.32 = 618.52/x
  3. Step 3: Cross multiply
    670.36x = 996.32 × 618.52
  4. Step 4: Simplify right side
    670.36x = 616,243.85
  5. Step 5: Solve for x
    x = 616,243.85/670.36
  6. Step 6: Final answer
    x = 919.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.