Home / 398,196,337.71-549,482,885.96-221,976,538.23

Finding the Fourth Proportional to 398,196,337.71, 549,482,885.96 and 221,976,538.23

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Solution

The fourth proportional to 398,196,337.71, 549,482,885.96 and 221,976,538.23 is: 306,311,980.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,196,337.71 : 549,482,885.96 = 221,976,538.23 : x
  2. Step 2: Convert to fraction form
    398,196,337.71/549,482,885.96 = 221,976,538.23/x
  3. Step 3: Cross multiply
    398,196,337.71x = 549,482,885.96 × 221,976,538.23
  4. Step 4: Simplify right side
    398,196,337.71x = 121,972,308,840,920,784
  5. Step 5: Solve for x
    x = 121,972,308,840,920,784/398,196,337.71
  6. Step 6: Final answer
    x = 306,311,980.52

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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.