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Finding the Fourth Proportional to 751.38, 1,126.51 and 289.10

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Solution

The fourth proportional to 751.38, 1,126.51 and 289.10 is: 433.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.38 : 1,126.51 = 289.10 : x
  2. Step 2: Convert to fraction form
    751.38/1,126.51 = 289.10/x
  3. Step 3: Cross multiply
    751.38x = 1,126.51 × 289.10
  4. Step 4: Simplify right side
    751.38x = 325,676.13
  5. Step 5: Solve for x
    x = 325,676.13/751.38
  6. Step 6: Final answer
    x = 433.44

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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.