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Finding the Fourth Proportional to 639,873,868.94, 882,981,337.93 and 361,361,584.07

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Solution

The fourth proportional to 639,873,868.94, 882,981,337.93 and 361,361,584.07 is: 498,653,797.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,873,868.94 : 882,981,337.93 = 361,361,584.07 : x
  2. Step 2: Convert to fraction form
    639,873,868.94/882,981,337.93 = 361,361,584.07/x
  3. Step 3: Cross multiply
    639,873,868.94x = 882,981,337.93 × 361,361,584.07
  4. Step 4: Simplify right side
    639,873,868.94x = 319,075,534,973,314,496
  5. Step 5: Solve for x
    x = 319,075,534,973,314,496/639,873,868.94
  6. Step 6: Final answer
    x = 498,653,797.98

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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.