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Finding the Fourth Proportional to 4,855.40, 7,282.92 and 1,392.64

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Solution

The fourth proportional to 4,855.40, 7,282.92 and 1,392.64 is: 2,088.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,855.40 : 7,282.92 = 1,392.64 : x
  2. Step 2: Convert to fraction form
    4,855.40/7,282.92 = 1,392.64/x
  3. Step 3: Cross multiply
    4,855.40x = 7,282.92 × 1,392.64
  4. Step 4: Simplify right side
    4,855.40x = 10,142,485.71
  5. Step 5: Solve for x
    x = 10,142,485.71/4,855.40
  6. Step 6: Final answer
    x = 2,088.91

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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.