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Finding the Fourth Proportional to 763.95, 1,055.11 and 516.29

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Solution

The fourth proportional to 763.95, 1,055.11 and 516.29 is: 713.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.95 : 1,055.11 = 516.29 : x
  2. Step 2: Convert to fraction form
    763.95/1,055.11 = 516.29/x
  3. Step 3: Cross multiply
    763.95x = 1,055.11 × 516.29
  4. Step 4: Simplify right side
    763.95x = 544,742.74
  5. Step 5: Solve for x
    x = 544,742.74/763.95
  6. Step 6: Final answer
    x = 713.06

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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.