Home / 720,614,746.82-994,449,815.97-390,590,109.38

Finding the Fourth Proportional to 720,614,746.82, 994,449,815.97 and 390,590,109.38

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Solution

The fourth proportional to 720,614,746.82, 994,449,815.97 and 390,590,109.38 is: 539,015,145.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,614,746.82 : 994,449,815.97 = 390,590,109.38 : x
  2. Step 2: Convert to fraction form
    720,614,746.82/994,449,815.97 = 390,590,109.38/x
  3. Step 3: Cross multiply
    720,614,746.82x = 994,449,815.97 × 390,590,109.38
  4. Step 4: Simplify right side
    720,614,746.82x = 388,422,262,392,643,200
  5. Step 5: Solve for x
    x = 388,422,262,392,643,200/720,614,746.82
  6. Step 6: Final answer
    x = 539,015,145.20

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1.5x scale

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.