Home / 685,314,589.45-945,729,055.21-372,040,748.77

Finding the Fourth Proportional to 685,314,589.45, 945,729,055.21 and 372,040,748.77

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Solution

The fourth proportional to 685,314,589.45, 945,729,055.21 and 372,040,748.77 is: 513,413,476.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,314,589.45 : 945,729,055.21 = 372,040,748.77 : x
  2. Step 2: Convert to fraction form
    685,314,589.45/945,729,055.21 = 372,040,748.77/x
  3. Step 3: Cross multiply
    685,314,589.45x = 945,729,055.21 × 372,040,748.77
  4. Step 4: Simplify right side
    685,314,589.45x = 351,849,745,833,873,088
  5. Step 5: Solve for x
    x = 351,849,745,833,873,088/685,314,589.45
  6. Step 6: Final answer
    x = 513,413,476.45

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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.