Home / 259,758.20-389,637.30-213,063.80

Finding the Fourth Proportional to 259,758.20, 389,637.30 and 213,063.80

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Solution

The fourth proportional to 259,758.20, 389,637.30 and 213,063.80 is: 319,595.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,758.20 : 389,637.30 = 213,063.80 : x
  2. Step 2: Convert to fraction form
    259,758.20/389,637.30 = 213,063.80/x
  3. Step 3: Cross multiply
    259,758.20x = 389,637.30 × 213,063.80
  4. Step 4: Simplify right side
    259,758.20x = 83,017,603,759.74
  5. Step 5: Solve for x
    x = 83,017,603,759.74/259,758.20
  6. Step 6: Final answer
    x = 319,595.70

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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.