Home / 398,196,365.69-549,482,924.49-221,976,566.21

Finding the Fourth Proportional to 398,196,365.69, 549,482,924.49 and 221,976,566.21

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Solution

The fourth proportional to 398,196,365.69, 549,482,924.49 and 221,976,566.21 is: 306,312,019.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,196,365.69 : 549,482,924.49 = 221,976,566.21 : x
  2. Step 2: Convert to fraction form
    398,196,365.69/549,482,924.49 = 221,976,566.21/x
  3. Step 3: Cross multiply
    398,196,365.69x = 549,482,924.49 × 221,976,566.21
  4. Step 4: Simplify right side
    398,196,365.69x = 121,972,332,769,860,224
  5. Step 5: Solve for x
    x = 121,972,332,769,860,224/398,196,365.69
  6. Step 6: Final answer
    x = 306,312,019.09

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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.