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Finding the Fourth Proportional to 739.72, 1,115.19 and 700.03

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Solution

The fourth proportional to 739.72, 1,115.19 and 700.03 is: 1,055.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.72 : 1,115.19 = 700.03 : x
  2. Step 2: Convert to fraction form
    739.72/1,115.19 = 700.03/x
  3. Step 3: Cross multiply
    739.72x = 1,115.19 × 700.03
  4. Step 4: Simplify right side
    739.72x = 780,666.46
  5. Step 5: Solve for x
    x = 780,666.46/739.72
  6. Step 6: Final answer
    x = 1,055.35

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.