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Finding the Fourth Proportional to 702,211,508.65, 969,051,864.27 and 388,965,900.88

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Solution

The fourth proportional to 702,211,508.65, 969,051,864.27 and 388,965,900.88 is: 536,772,933.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,211,508.65 : 969,051,864.27 = 388,965,900.88 : x
  2. Step 2: Convert to fraction form
    702,211,508.65/969,051,864.27 = 388,965,900.88/x
  3. Step 3: Cross multiply
    702,211,508.65x = 969,051,864.27 × 388,965,900.88
  4. Step 4: Simplify right side
    702,211,508.65x = 376,928,131,385,224,000
  5. Step 5: Solve for x
    x = 376,928,131,385,224,000/702,211,508.65
  6. Step 6: Final answer
    x = 536,772,933.43

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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.