Home / 398,196,338.46-549,482,886.99-221,976,538.98

Finding the Fourth Proportional to 398,196,338.46, 549,482,886.99 and 221,976,538.98

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Solution

The fourth proportional to 398,196,338.46, 549,482,886.99 and 221,976,538.98 is: 306,311,981.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,196,338.46 : 549,482,886.99 = 221,976,538.98 : x
  2. Step 2: Convert to fraction form
    398,196,338.46/549,482,886.99 = 221,976,538.98/x
  3. Step 3: Cross multiply
    398,196,338.46x = 549,482,886.99 × 221,976,538.98
  4. Step 4: Simplify right side
    398,196,338.46x = 121,972,309,482,778,672
  5. Step 5: Solve for x
    x = 121,972,309,482,778,672/398,196,338.46
  6. Step 6: Final answer
    x = 306,311,981.56

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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.