Home / 398,196,338.71-549,482,887.33-221,976,539.23

Finding the Fourth Proportional to 398,196,338.71, 549,482,887.33 and 221,976,539.23

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Solution

The fourth proportional to 398,196,338.71, 549,482,887.33 and 221,976,539.23 is: 306,311,981.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,196,338.71 : 549,482,887.33 = 221,976,539.23 : x
  2. Step 2: Convert to fraction form
    398,196,338.71/549,482,887.33 = 221,976,539.23/x
  3. Step 3: Cross multiply
    398,196,338.71x = 549,482,887.33 × 221,976,539.23
  4. Step 4: Simplify right side
    398,196,338.71x = 121,972,309,695,621,424
  5. Step 5: Solve for x
    x = 121,972,309,695,621,424/398,196,338.71
  6. Step 6: Final answer
    x = 306,311,981.90

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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.