Home / 389,929.80-583,910.55-256,085.40

Finding the Fourth Proportional to 389,929.80, 583,910.55 and 256,085.40

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Solution

The fourth proportional to 389,929.80, 583,910.55 and 256,085.40 is: 383,481.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,929.80 : 583,910.55 = 256,085.40 : x
  2. Step 2: Convert to fraction form
    389,929.80/583,910.55 = 256,085.40/x
  3. Step 3: Cross multiply
    389,929.80x = 583,910.55 × 256,085.40
  4. Step 4: Simplify right side
    389,929.80x = 149,530,966,760.97
  5. Step 5: Solve for x
    x = 149,530,966,760.97/389,929.80
  6. Step 6: Final answer
    x = 383,481.76

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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.