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Finding the Fourth Proportional to 999.35, 1,379.48 and 751.40

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Solution

The fourth proportional to 999.35, 1,379.48 and 751.40 is: 1,037.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.35 : 1,379.48 = 751.40 : x
  2. Step 2: Convert to fraction form
    999.35/1,379.48 = 751.40/x
  3. Step 3: Cross multiply
    999.35x = 1,379.48 × 751.40
  4. Step 4: Simplify right side
    999.35x = 1,036,536.25
  5. Step 5: Solve for x
    x = 1,036,536.25/999.35
  6. Step 6: Final answer
    x = 1,037.21

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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.