Home / 859,415.80-1,288,273.20-379,903.90

Finding the Fourth Proportional to 859,415.80, 1,288,273.20 and 379,903.90

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Solution

The fourth proportional to 859,415.80, 1,288,273.20 and 379,903.90 is: 569,479.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,415.80 : 1,288,273.20 = 379,903.90 : x
  2. Step 2: Convert to fraction form
    859,415.80/1,288,273.20 = 379,903.90/x
  3. Step 3: Cross multiply
    859,415.80x = 1,288,273.20 × 379,903.90
  4. Step 4: Simplify right side
    859,415.80x = 489,420,012,945.48
  5. Step 5: Solve for x
    x = 489,420,012,945.48/859,415.80
  6. Step 6: Final answer
    x = 569,479.89

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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.