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Finding the Fourth Proportional to 3,385.81, 5,074.53 and 1,536.40

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Solution

The fourth proportional to 3,385.81, 5,074.53 and 1,536.40 is: 2,302.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,385.81 : 5,074.53 = 1,536.40 : x
  2. Step 2: Convert to fraction form
    3,385.81/5,074.53 = 1,536.40/x
  3. Step 3: Cross multiply
    3,385.81x = 5,074.53 × 1,536.40
  4. Step 4: Simplify right side
    3,385.81x = 7,796,507.89
  5. Step 5: Solve for x
    x = 7,796,507.89/3,385.81
  6. Step 6: Final answer
    x = 2,302.70

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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.