Home / 680,245,917,299.45-938,767,884,978.47-391,214,402,357.90

Finding the Fourth Proportional to 680,245,917,299.45, 938,767,884,978.47 and 391,214,402,357.90

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Solution

The fourth proportional to 680,245,917,299.45, 938,767,884,978.47 and 391,214,402,357.90 is: 539,892,276,799.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,245,917,299.45 : 938,767,884,978.47 = 391,214,402,357.90 : x
  2. Step 2: Convert to fraction form
    680,245,917,299.45/938,767,884,978.47 = 391,214,402,357.90/x
  3. Step 3: Cross multiply
    680,245,917,299.45x = 938,767,884,978.47 × 391,214,402,357.90
  4. Step 4: Simplify right side
    680,245,917,299.45x = 367,259,517,074,641,994,645,504
  5. Step 5: Solve for x
    x = 367,259,517,074,641,994,645,504/680,245,917,299.45
  6. Step 6: Final answer
    x = 539,892,276,799.91

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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.