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Finding the Fourth Proportional to 408,079,812.30, 612,119,718.45 and 408,079,812.30

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Solution

The fourth proportional to 408,079,812.30, 612,119,718.45 and 408,079,812.30 is: 612,119,718.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,079,812.30 : 612,119,718.45 = 408,079,812.30 : x
  2. Step 2: Convert to fraction form
    408,079,812.30/612,119,718.45 = 408,079,812.30/x
  3. Step 3: Cross multiply
    408,079,812.30x = 612,119,718.45 × 408,079,812.30
  4. Step 4: Simplify right side
    408,079,812.30x = 249,793,699,810,204,864
  5. Step 5: Solve for x
    x = 249,793,699,810,204,864/408,079,812.30
  6. Step 6: Final answer
    x = 612,119,718.45

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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.