Home / 259,639.40-389,430.30-212,810.60

Finding the Fourth Proportional to 259,639.40, 389,430.30 and 212,810.60

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Solution

The fourth proportional to 259,639.40, 389,430.30 and 212,810.60 is: 319,192.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,639.40 : 389,430.30 = 212,810.60 : x
  2. Step 2: Convert to fraction form
    259,639.40/389,430.30 = 212,810.60/x
  3. Step 3: Cross multiply
    259,639.40x = 389,430.30 × 212,810.60
  4. Step 4: Simplify right side
    259,639.40x = 82,874,895,801.18
  5. Step 5: Solve for x
    x = 82,874,895,801.18/259,639.40
  6. Step 6: Final answer
    x = 319,192.29

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1.5x scale

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.