Home / 405,727,709.76-608,882,138.88-172,721,784.64

Finding the Fourth Proportional to 405,727,709.76, 608,882,138.88 and 172,721,784.64

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Solution

The fourth proportional to 405,727,709.76, 608,882,138.88 and 172,721,784.64 is: 259,206,376.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,727,709.76 : 608,882,138.88 = 172,721,784.64 : x
  2. Step 2: Convert to fraction form
    405,727,709.76/608,882,138.88 = 172,721,784.64/x
  3. Step 3: Cross multiply
    405,727,709.76x = 608,882,138.88 × 172,721,784.64
  4. Step 4: Simplify right side
    405,727,709.76x = 105,167,209,662,773,920
  5. Step 5: Solve for x
    x = 105,167,209,662,773,920/405,727,709.76
  6. Step 6: Final answer
    x = 259,206,376.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.