Home / 658,015.20-985,273.20-420,069.60

Finding the Fourth Proportional to 658,015.20, 985,273.20 and 420,069.60

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Solution

The fourth proportional to 658,015.20, 985,273.20 and 420,069.60 is: 628,987.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,015.20 : 985,273.20 = 420,069.60 : x
  2. Step 2: Convert to fraction form
    658,015.20/985,273.20 = 420,069.60/x
  3. Step 3: Cross multiply
    658,015.20x = 985,273.20 × 420,069.60
  4. Step 4: Simplify right side
    658,015.20x = 413,883,319,014.72
  5. Step 5: Solve for x
    x = 413,883,319,014.72/658,015.20
  6. Step 6: Final answer
    x = 628,987.47

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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.