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Finding the Fourth Proportional to 665.10, 917.81 and 370.36

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Solution

The fourth proportional to 665.10, 917.81 and 370.36 is: 511.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.10 : 917.81 = 370.36 : x
  2. Step 2: Convert to fraction form
    665.10/917.81 = 370.36/x
  3. Step 3: Cross multiply
    665.10x = 917.81 × 370.36
  4. Step 4: Simplify right side
    665.10x = 339,916.89
  5. Step 5: Solve for x
    x = 339,916.89/665.10
  6. Step 6: Final answer
    x = 511.08

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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.