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Finding the Fourth Proportional to 786.58, 1,173.90 and 754.79

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Solution

The fourth proportional to 786.58, 1,173.90 and 754.79 is: 1,126.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    786.58 : 1,173.90 = 754.79 : x
  2. Step 2: Convert to fraction form
    786.58/1,173.90 = 754.79/x
  3. Step 3: Cross multiply
    786.58x = 1,173.90 × 754.79
  4. Step 4: Simplify right side
    786.58x = 886,047.98
  5. Step 5: Solve for x
    x = 886,047.98/786.58
  6. Step 6: Final answer
    x = 1,126.46

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.