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Finding the Fourth Proportional to 751.88, 1,037.46 and 648.20

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Solution

The fourth proportional to 751.88, 1,037.46 and 648.20 is: 894.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.88 : 1,037.46 = 648.20 : x
  2. Step 2: Convert to fraction form
    751.88/1,037.46 = 648.20/x
  3. Step 3: Cross multiply
    751.88x = 1,037.46 × 648.20
  4. Step 4: Simplify right side
    751.88x = 672,481.57
  5. Step 5: Solve for x
    x = 672,481.57/751.88
  6. Step 6: Final answer
    x = 894.40

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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.