Home / 2,101.40-2,898.64-1,305

Finding the Fourth Proportional to 2,101.40, 2,898.64 and 1,305

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Solution

The fourth proportional to 2,101.40, 2,898.64 and 1,305 is: 1,800.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,101.40 : 2,898.64 = 1,305 : x
  2. Step 2: Convert to fraction form
    2,101.40/2,898.64 = 1,305/x
  3. Step 3: Cross multiply
    2,101.40x = 2,898.64 × 1,305
  4. Step 4: Simplify right side
    2,101.40x = 3,782,725.20
  5. Step 5: Solve for x
    x = 3,782,725.20/2,101.40
  6. Step 6: Final answer
    x = 1,800.10

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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.