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Finding the Fourth Proportional to 2,752.77, 4,129.12 and 1,290.89

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Solution

The fourth proportional to 2,752.77, 4,129.12 and 1,290.89 is: 1,936.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,752.77 : 4,129.12 = 1,290.89 : x
  2. Step 2: Convert to fraction form
    2,752.77/4,129.12 = 1,290.89/x
  3. Step 3: Cross multiply
    2,752.77x = 4,129.12 × 1,290.89
  4. Step 4: Simplify right side
    2,752.77x = 5,330,239.72
  5. Step 5: Solve for x
    x = 5,330,239.72/2,752.77
  6. Step 6: Final answer
    x = 1,936.32

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1.5x scale

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.