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Finding the Fourth Proportional to 1,064.26, 1,467.37 and 685.51

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Solution

The fourth proportional to 1,064.26, 1,467.37 and 685.51 is: 945.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,064.26 : 1,467.37 = 685.51 : x
  2. Step 2: Convert to fraction form
    1,064.26/1,467.37 = 685.51/x
  3. Step 3: Cross multiply
    1,064.26x = 1,467.37 × 685.51
  4. Step 4: Simplify right side
    1,064.26x = 1,005,898.40
  5. Step 5: Solve for x
    x = 1,005,898.40/1,064.26
  6. Step 6: Final answer
    x = 945.16

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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.