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Finding the Fourth Proportional to 608,080,639.20, 912,120,958.80 and 608,080,639.20

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Solution

The fourth proportional to 608,080,639.20, 912,120,958.80 and 608,080,639.20 is: 912,120,958.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,080,639.20 : 912,120,958.80 = 608,080,639.20 : x
  2. Step 2: Convert to fraction form
    608,080,639.20/912,120,958.80 = 608,080,639.20/x
  3. Step 3: Cross multiply
    608,080,639.20x = 912,120,958.80 × 608,080,639.20
  4. Step 4: Simplify right side
    608,080,639.20x = 554,643,095,654,820,864
  5. Step 5: Solve for x
    x = 554,643,095,654,820,864/608,080,639.20
  6. Step 6: Final answer
    x = 912,120,958.80

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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.