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Finding the Fourth Proportional to 764.60, 1,054.94 and 499.37

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Solution

The fourth proportional to 764.60, 1,054.94 and 499.37 is: 688.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.60 : 1,054.94 = 499.37 : x
  2. Step 2: Convert to fraction form
    764.60/1,054.94 = 499.37/x
  3. Step 3: Cross multiply
    764.60x = 1,054.94 × 499.37
  4. Step 4: Simplify right side
    764.60x = 526,797.62
  5. Step 5: Solve for x
    x = 526,797.62/764.60
  6. Step 6: Final answer
    x = 688.99

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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.