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Finding the Fourth Proportional to 1,656.65, 2,485.49 and 682.83

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Solution

The fourth proportional to 1,656.65, 2,485.49 and 682.83 is: 1,024.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,656.65 : 2,485.49 = 682.83 : x
  2. Step 2: Convert to fraction form
    1,656.65/2,485.49 = 682.83/x
  3. Step 3: Cross multiply
    1,656.65x = 2,485.49 × 682.83
  4. Step 4: Simplify right side
    1,656.65x = 1,697,163.72
  5. Step 5: Solve for x
    x = 1,697,163.72/1,656.65
  6. Step 6: Final answer
    x = 1,024.45

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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.