Home / 398,196,338.21-549,482,886.65-221,976,538.73

Finding the Fourth Proportional to 398,196,338.21, 549,482,886.65 and 221,976,538.73

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Solution

The fourth proportional to 398,196,338.21, 549,482,886.65 and 221,976,538.73 is: 306,311,981.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,196,338.21 : 549,482,886.65 = 221,976,538.73 : x
  2. Step 2: Convert to fraction form
    398,196,338.21/549,482,886.65 = 221,976,538.73/x
  3. Step 3: Cross multiply
    398,196,338.21x = 549,482,886.65 × 221,976,538.73
  4. Step 4: Simplify right side
    398,196,338.21x = 121,972,309,268,826,032
  5. Step 5: Solve for x
    x = 121,972,309,268,826,032/398,196,338.21
  6. Step 6: Final answer
    x = 306,311,981.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.