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Finding the Fourth Proportional to 914.53, 1,261.74 and 516.15

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Solution

The fourth proportional to 914.53, 1,261.74 and 516.15 is: 712.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.53 : 1,261.74 = 516.15 : x
  2. Step 2: Convert to fraction form
    914.53/1,261.74 = 516.15/x
  3. Step 3: Cross multiply
    914.53x = 1,261.74 × 516.15
  4. Step 4: Simplify right side
    914.53x = 651,243.31
  5. Step 5: Solve for x
    x = 651,243.31/914.53
  6. Step 6: Final answer
    x = 712.10

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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.