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Finding the Fourth Proportional to 702,211,519.68, 969,051,879.48 and 388,965,911.88

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Solution

The fourth proportional to 702,211,519.68, 969,051,879.48 and 388,965,911.88 is: 536,772,948.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,211,519.68 : 969,051,879.48 = 388,965,911.88 : x
  2. Step 2: Convert to fraction form
    702,211,519.68/969,051,879.48 = 388,965,911.88/x
  3. Step 3: Cross multiply
    702,211,519.68x = 969,051,879.48 × 388,965,911.88
  4. Step 4: Simplify right side
    702,211,519.68x = 376,928,147,960,966,080
  5. Step 5: Solve for x
    x = 376,928,147,960,966,080/702,211,519.68
  6. Step 6: Final answer
    x = 536,772,948.60

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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.