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Finding the Fourth Proportional to 1,164.25, 1,606.67 and 640.33

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Solution

The fourth proportional to 1,164.25, 1,606.67 and 640.33 is: 883.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,164.25 : 1,606.67 = 640.33 : x
  2. Step 2: Convert to fraction form
    1,164.25/1,606.67 = 640.33/x
  3. Step 3: Cross multiply
    1,164.25x = 1,606.67 × 640.33
  4. Step 4: Simplify right side
    1,164.25x = 1,028,795.80
  5. Step 5: Solve for x
    x = 1,028,795.80/1,164.25
  6. Step 6: Final answer
    x = 883.66

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1.5x scale

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.