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Finding the Fourth Proportional to 730.35, 1,089.72 and 713.75

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Solution

The fourth proportional to 730.35, 1,089.72 and 713.75 is: 1,064.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.35 : 1,089.72 = 713.75 : x
  2. Step 2: Convert to fraction form
    730.35/1,089.72 = 713.75/x
  3. Step 3: Cross multiply
    730.35x = 1,089.72 × 713.75
  4. Step 4: Simplify right side
    730.35x = 777,782.20
  5. Step 5: Solve for x
    x = 777,782.20/730.35
  6. Step 6: Final answer
    x = 1,064.94

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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.