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Finding the Fourth Proportional to 5,318.52, 7,981.42 and 1,855.77

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Solution

The fourth proportional to 5,318.52, 7,981.42 and 1,855.77 is: 2,784.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,318.52 : 7,981.42 = 1,855.77 : x
  2. Step 2: Convert to fraction form
    5,318.52/7,981.42 = 1,855.77/x
  3. Step 3: Cross multiply
    5,318.52x = 7,981.42 × 1,855.77
  4. Step 4: Simplify right side
    5,318.52x = 14,811,639.89
  5. Step 5: Solve for x
    x = 14,811,639.89/5,318.52
  6. Step 6: Final answer
    x = 2,784.92

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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.