Home / 391,149,403.51-539,246,807.94-312,032,993.15

Finding the Fourth Proportional to 391,149,403.51, 539,246,807.94 and 312,032,993.15

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Solution

The fourth proportional to 391,149,403.51, 539,246,807.94 and 312,032,993.15 is: 430,175,257.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,149,403.51 : 539,246,807.94 = 312,032,993.15 : x
  2. Step 2: Convert to fraction form
    391,149,403.51/539,246,807.94 = 312,032,993.15/x
  3. Step 3: Cross multiply
    391,149,403.51x = 539,246,807.94 × 312,032,993.15
  4. Step 4: Simplify right side
    391,149,403.51x = 168,262,795,526,914,752
  5. Step 5: Solve for x
    x = 168,262,795,526,914,752/391,149,403.51
  6. Step 6: Final answer
    x = 430,175,257.89

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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.