Home / 720,614,747.07-994,449,816.32-390,590,109.63

Finding the Fourth Proportional to 720,614,747.07, 994,449,816.32 and 390,590,109.63

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Solution

The fourth proportional to 720,614,747.07, 994,449,816.32 and 390,590,109.63 is: 539,015,145.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,614,747.07 : 994,449,816.32 = 390,590,109.63 : x
  2. Step 2: Convert to fraction form
    720,614,747.07/994,449,816.32 = 390,590,109.63/x
  3. Step 3: Cross multiply
    720,614,747.07x = 994,449,816.32 × 390,590,109.63
  4. Step 4: Simplify right side
    720,614,747.07x = 388,422,262,776,009,216
  5. Step 5: Solve for x
    x = 388,422,262,776,009,216/720,614,747.07
  6. Step 6: Final answer
    x = 539,015,145.55

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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.