Home / 398,196,362.88-549,482,920.61-221,976,563.40

Finding the Fourth Proportional to 398,196,362.88, 549,482,920.61 and 221,976,563.40

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Solution

The fourth proportional to 398,196,362.88, 549,482,920.61 and 221,976,563.40 is: 306,312,015.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,196,362.88 : 549,482,920.61 = 221,976,563.40 : x
  2. Step 2: Convert to fraction form
    398,196,362.88/549,482,920.61 = 221,976,563.40/x
  3. Step 3: Cross multiply
    398,196,362.88x = 549,482,920.61 × 221,976,563.40
  4. Step 4: Simplify right side
    398,196,362.88x = 121,972,330,362,892,960
  5. Step 5: Solve for x
    x = 121,972,330,362,892,960/398,196,362.88
  6. Step 6: Final answer
    x = 306,312,015.21

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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.