Home / 720,809,100,449.45-994,717,543,655.30-391,212,143,697.95

Finding the Fourth Proportional to 720,809,100,449.45, 994,717,543,655.30 and 391,212,143,697.95

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Solution

The fourth proportional to 720,809,100,449.45, 994,717,543,655.30 and 391,212,143,697.95 is: 539,873,292,921.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,809,100,449.45 : 994,717,543,655.30 = 391,212,143,697.95 : x
  2. Step 2: Convert to fraction form
    720,809,100,449.45/994,717,543,655.30 = 391,212,143,697.95/x
  3. Step 3: Cross multiply
    720,809,100,449.45x = 994,717,543,655.30 × 391,212,143,697.95
  4. Step 4: Simplify right side
    720,809,100,449.45x = 389,145,582,627,349,094,989,824
  5. Step 5: Solve for x
    x = 389,145,582,627,349,094,989,824/720,809,100,449.45
  6. Step 6: Final answer
    x = 539,873,292,921.39

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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.