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Finding the Fourth Proportional to 1,064.65, 1,469.91 and 672.25

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Solution

The fourth proportional to 1,064.65, 1,469.91 and 672.25 is: 928.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,064.65 : 1,469.91 = 672.25 : x
  2. Step 2: Convert to fraction form
    1,064.65/1,469.91 = 672.25/x
  3. Step 3: Cross multiply
    1,064.65x = 1,469.91 × 672.25
  4. Step 4: Simplify right side
    1,064.65x = 988,143.64
  5. Step 5: Solve for x
    x = 988,143.64/1,064.65
  6. Step 6: Final answer
    x = 928.14

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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.