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Finding the Fourth Proportional to 764.07, 1,054.33 and 428.00

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Solution

The fourth proportional to 764.07, 1,054.33 and 428.00 is: 590.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.07 : 1,054.33 = 428.00 : x
  2. Step 2: Convert to fraction form
    764.07/1,054.33 = 428.00/x
  3. Step 3: Cross multiply
    764.07x = 1,054.33 × 428.00
  4. Step 4: Simplify right side
    764.07x = 451,247.97
  5. Step 5: Solve for x
    x = 451,247.97/764.07
  6. Step 6: Final answer
    x = 590.58

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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.