Home / 768,672,632.80-1,060,844,100.24-438,697,139.68

Finding the Fourth Proportional to 768,672,632.80, 1,060,844,100.24 and 438,697,139.68

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Solution

The fourth proportional to 768,672,632.80, 1,060,844,100.24 and 438,697,139.68 is: 605,445,351.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,672,632.80 : 1,060,844,100.24 = 438,697,139.68 : x
  2. Step 2: Convert to fraction form
    768,672,632.80/1,060,844,100.24 = 438,697,139.68/x
  3. Step 3: Cross multiply
    768,672,632.80x = 1,060,844,100.24 × 438,697,139.68
  4. Step 4: Simplify right side
    768,672,632.80x = 465,389,272,421,691,200
  5. Step 5: Solve for x
    x = 465,389,272,421,691,200/768,672,632.80
  6. Step 6: Final answer
    x = 605,445,351.59

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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.