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Finding the Fourth Proportional to 1,410.26, 2,115.45 and 751.86

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Solution

The fourth proportional to 1,410.26, 2,115.45 and 751.86 is: 1,127.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,410.26 : 2,115.45 = 751.86 : x
  2. Step 2: Convert to fraction form
    1,410.26/2,115.45 = 751.86/x
  3. Step 3: Cross multiply
    1,410.26x = 2,115.45 × 751.86
  4. Step 4: Simplify right side
    1,410.26x = 1,590,522.24
  5. Step 5: Solve for x
    x = 1,590,522.24/1,410.26
  6. Step 6: Final answer
    x = 1,127.83

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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.