Home / 290,305,474.80-435,657,277.80-128,863,273.20

Finding the Fourth Proportional to 290,305,474.80, 435,657,277.80 and 128,863,273.20

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Solution

The fourth proportional to 290,305,474.80, 435,657,277.80 and 128,863,273.20 is: 193,383,272.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,305,474.80 : 435,657,277.80 = 128,863,273.20 : x
  2. Step 2: Convert to fraction form
    290,305,474.80/435,657,277.80 = 128,863,273.20/x
  3. Step 3: Cross multiply
    290,305,474.80x = 435,657,277.80 × 128,863,273.20
  4. Step 4: Simplify right side
    290,305,474.80x = 56,140,222,810,709,696
  5. Step 5: Solve for x
    x = 56,140,222,810,709,696/290,305,474.80
  6. Step 6: Final answer
    x = 193,383,272.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.