Home / 389,923.20-584,481.60-212,054.40

Finding the Fourth Proportional to 389,923.20, 584,481.60 and 212,054.40

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Solution

The fourth proportional to 389,923.20, 584,481.60 and 212,054.40 is: 317,862.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,923.20 : 584,481.60 = 212,054.40 : x
  2. Step 2: Convert to fraction form
    389,923.20/584,481.60 = 212,054.40/x
  3. Step 3: Cross multiply
    389,923.20x = 584,481.60 × 212,054.40
  4. Step 4: Simplify right side
    389,923.20x = 123,941,894,999.04
  5. Step 5: Solve for x
    x = 123,941,894,999.04/389,923.20
  6. Step 6: Final answer
    x = 317,862.33

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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.