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Finding the Fourth Proportional to 751.42, 1,034.86 and 735.28

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Solution

The fourth proportional to 751.42, 1,034.86 and 735.28 is: 1,012.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.42 : 1,034.86 = 735.28 : x
  2. Step 2: Convert to fraction form
    751.42/1,034.86 = 735.28/x
  3. Step 3: Cross multiply
    751.42x = 1,034.86 × 735.28
  4. Step 4: Simplify right side
    751.42x = 760,911.86
  5. Step 5: Solve for x
    x = 760,911.86/751.42
  6. Step 6: Final answer
    x = 1,012.63

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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.