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Finding the Fourth Proportional to 763.93, 1,145.64 and 276.87

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Solution

The fourth proportional to 763.93, 1,145.64 and 276.87 is: 415.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.93 : 1,145.64 = 276.87 : x
  2. Step 2: Convert to fraction form
    763.93/1,145.64 = 276.87/x
  3. Step 3: Cross multiply
    763.93x = 1,145.64 × 276.87
  4. Step 4: Simplify right side
    763.93x = 317,192.24
  5. Step 5: Solve for x
    x = 317,192.24/763.93
  6. Step 6: Final answer
    x = 415.21

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