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Finding the Fourth Proportional to 751.48, 1,128.42 and 566.40

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Solution

The fourth proportional to 751.48, 1,128.42 and 566.40 is: 850.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.48 : 1,128.42 = 566.40 : x
  2. Step 2: Convert to fraction form
    751.48/1,128.42 = 566.40/x
  3. Step 3: Cross multiply
    751.48x = 1,128.42 × 566.40
  4. Step 4: Simplify right side
    751.48x = 639,137.09
  5. Step 5: Solve for x
    x = 639,137.09/751.48
  6. Step 6: Final answer
    x = 850.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.