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Finding the Fourth Proportional to 2,526.81, 3,790.12 and 771.74

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Solution

The fourth proportional to 2,526.81, 3,790.12 and 771.74 is: 1,157.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,526.81 : 3,790.12 = 771.74 : x
  2. Step 2: Convert to fraction form
    2,526.81/3,790.12 = 771.74/x
  3. Step 3: Cross multiply
    2,526.81x = 3,790.12 × 771.74
  4. Step 4: Simplify right side
    2,526.81x = 2,924,983.35
  5. Step 5: Solve for x
    x = 2,924,983.35/2,526.81
  6. Step 6: Final answer
    x = 1,157.58

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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.