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Finding the Fourth Proportional to 665.32, 918.20 and 370.62

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Solution

The fourth proportional to 665.32, 918.20 and 370.62 is: 511.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.32 : 918.20 = 370.62 : x
  2. Step 2: Convert to fraction form
    665.32/918.20 = 370.62/x
  3. Step 3: Cross multiply
    665.32x = 918.20 × 370.62
  4. Step 4: Simplify right side
    665.32x = 340,303.28
  5. Step 5: Solve for x
    x = 340,303.28/665.32
  6. Step 6: Final answer
    x = 511.49

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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.