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Finding the Fourth Proportional to 4,776.64, 7,166.80 and 1,857

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Solution

The fourth proportional to 4,776.64, 7,166.80 and 1,857 is: 2,786.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,776.64 : 7,166.80 = 1,857 : x
  2. Step 2: Convert to fraction form
    4,776.64/7,166.80 = 1,857/x
  3. Step 3: Cross multiply
    4,776.64x = 7,166.80 × 1,857
  4. Step 4: Simplify right side
    4,776.64x = 13,308,747.60
  5. Step 5: Solve for x
    x = 13,308,747.60/4,776.64
  6. Step 6: Final answer
    x = 2,786.22

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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.