Home / 278,620.22-418,001.07-128,968.46

Finding the Fourth Proportional to 278,620.22, 418,001.07 and 128,968.46

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Solution

The fourth proportional to 278,620.22, 418,001.07 and 128,968.46 is: 193,485.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,620.22 : 418,001.07 = 128,968.46 : x
  2. Step 2: Convert to fraction form
    278,620.22/418,001.07 = 128,968.46/x
  3. Step 3: Cross multiply
    278,620.22x = 418,001.07 × 128,968.46
  4. Step 4: Simplify right side
    278,620.22x = 53,908,954,276.25
  5. Step 5: Solve for x
    x = 53,908,954,276.25/278,620.22
  6. Step 6: Final answer
    x = 193,485.43

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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.