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Finding the Fourth Proportional to 621,985,975.49, 858,334,995.33 and 339,728,357.59

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Solution

The fourth proportional to 621,985,975.49, 858,334,995.33 and 339,728,357.59 is: 468,822,046.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,985,975.49 : 858,334,995.33 = 339,728,357.59 : x
  2. Step 2: Convert to fraction form
    621,985,975.49/858,334,995.33 = 339,728,357.59/x
  3. Step 3: Cross multiply
    621,985,975.49x = 858,334,995.33 × 339,728,357.59
  4. Step 4: Simplify right side
    621,985,975.49x = 291,600,738,223,335,360
  5. Step 5: Solve for x
    x = 291,600,738,223,335,360/621,985,975.49
  6. Step 6: Final answer
    x = 468,822,046.98

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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.