Home / 1,782.14-2,456.34-1,221.62

Finding the Fourth Proportional to 1,782.14, 2,456.34 and 1,221.62

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Solution

The fourth proportional to 1,782.14, 2,456.34 and 1,221.62 is: 1,683.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,782.14 : 2,456.34 = 1,221.62 : x
  2. Step 2: Convert to fraction form
    1,782.14/2,456.34 = 1,221.62/x
  3. Step 3: Cross multiply
    1,782.14x = 2,456.34 × 1,221.62
  4. Step 4: Simplify right side
    1,782.14x = 3,000,714.07
  5. Step 5: Solve for x
    x = 3,000,714.07/1,782.14
  6. Step 6: Final answer
    x = 1,683.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.