Home / 1,656.12-2,479.68-1,289.28

Finding the Fourth Proportional to 1,656.12, 2,479.68 and 1,289.28

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Solution

The fourth proportional to 1,656.12, 2,479.68 and 1,289.28 is: 1,930.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,656.12 : 2,479.68 = 1,289.28 : x
  2. Step 2: Convert to fraction form
    1,656.12/2,479.68 = 1,289.28/x
  3. Step 3: Cross multiply
    1,656.12x = 2,479.68 × 1,289.28
  4. Step 4: Simplify right side
    1,656.12x = 3,197,001.83
  5. Step 5: Solve for x
    x = 3,197,001.83/1,656.12
  6. Step 6: Final answer
    x = 1,930.42

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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.