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Finding the Fourth Proportional to 764.29, 1,145.62 and 417.61

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Solution

The fourth proportional to 764.29, 1,145.62 and 417.61 is: 625.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.29 : 1,145.62 = 417.61 : x
  2. Step 2: Convert to fraction form
    764.29/1,145.62 = 417.61/x
  3. Step 3: Cross multiply
    764.29x = 1,145.62 × 417.61
  4. Step 4: Simplify right side
    764.29x = 478,422.37
  5. Step 5: Solve for x
    x = 478,422.37/764.29
  6. Step 6: Final answer
    x = 625.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.