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Finding the Fourth Proportional to 665.98, 918.21 and 541.37

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Solution

The fourth proportional to 665.98, 918.21 and 541.37 is: 746.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.98 : 918.21 = 541.37 : x
  2. Step 2: Convert to fraction form
    665.98/918.21 = 541.37/x
  3. Step 3: Cross multiply
    665.98x = 918.21 × 541.37
  4. Step 4: Simplify right side
    665.98x = 497,091.35
  5. Step 5: Solve for x
    x = 497,091.35/665.98
  6. Step 6: Final answer
    x = 746.41

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Double scale
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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.