Home / 280,206.36-420,595.45-205,103.42

Finding the Fourth Proportional to 280,206.36, 420,595.45 and 205,103.42

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Solution

The fourth proportional to 280,206.36, 420,595.45 and 205,103.42 is: 307,864.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,206.36 : 420,595.45 = 205,103.42 : x
  2. Step 2: Convert to fraction form
    280,206.36/420,595.45 = 205,103.42/x
  3. Step 3: Cross multiply
    280,206.36x = 420,595.45 × 205,103.42
  4. Step 4: Simplify right side
    280,206.36x = 86,265,565,231.44
  5. Step 5: Solve for x
    x = 86,265,565,231.44/280,206.36
  6. Step 6: Final answer
    x = 307,864.41

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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.