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Finding the Fourth Proportional to 665.21, 918.01 and 370.46

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Solution

The fourth proportional to 665.21, 918.01 and 370.46 is: 511.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.21 : 918.01 = 370.46 : x
  2. Step 2: Convert to fraction form
    665.21/918.01 = 370.46/x
  3. Step 3: Cross multiply
    665.21x = 918.01 × 370.46
  4. Step 4: Simplify right side
    665.21x = 340,087.35
  5. Step 5: Solve for x
    x = 340,087.35/665.21
  6. Step 6: Final answer
    x = 511.25

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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.