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Finding the Fourth Proportional to 1,686.56, 2,529.80 and 1,410.08

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Solution

The fourth proportional to 1,686.56, 2,529.80 and 1,410.08 is: 2,115.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.56 : 2,529.80 = 1,410.08 : x
  2. Step 2: Convert to fraction form
    1,686.56/2,529.80 = 1,410.08/x
  3. Step 3: Cross multiply
    1,686.56x = 2,529.80 × 1,410.08
  4. Step 4: Simplify right side
    1,686.56x = 3,567,220.38
  5. Step 5: Solve for x
    x = 3,567,220.38/1,686.56
  6. Step 6: Final answer
    x = 2,115.09

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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.