Home / 278,824.64-417,675.62-128,858.40

Finding the Fourth Proportional to 278,824.64, 417,675.62 and 128,858.40

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Solution

The fourth proportional to 278,824.64, 417,675.62 and 128,858.40 is: 193,028.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,824.64 : 417,675.62 = 128,858.40 : x
  2. Step 2: Convert to fraction form
    278,824.64/417,675.62 = 128,858.40/x
  3. Step 3: Cross multiply
    278,824.64x = 417,675.62 × 128,858.40
  4. Step 4: Simplify right side
    278,824.64x = 53,821,012,112.21
  5. Step 5: Solve for x
    x = 53,821,012,112.21/278,824.64
  6. Step 6: Final answer
    x = 193,028.18

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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.