Home / 640,421,382,198.45-883,797,768,354.30-351,389,564,986.71

Finding the Fourth Proportional to 640,421,382,198.45, 883,797,768,354.30 and 351,389,564,986.71

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Solution

The fourth proportional to 640,421,382,198.45, 883,797,768,354.30 and 351,389,564,986.71 is: 484,926,521,803.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,421,382,198.45 : 883,797,768,354.30 = 351,389,564,986.71 : x
  2. Step 2: Convert to fraction form
    640,421,382,198.45/883,797,768,354.30 = 351,389,564,986.71/x
  3. Step 3: Cross multiply
    640,421,382,198.45x = 883,797,768,354.30 × 351,389,564,986.71
  4. Step 4: Simplify right side
    640,421,382,198.45x = 310,557,313,358,242,600,976,384
  5. Step 5: Solve for x
    x = 310,557,313,358,242,600,976,384/640,421,382,198.45
  6. Step 6: Final answer
    x = 484,926,521,803.75

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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.