Home / 378,198,131.64-521,921,407.64-213,185,657.40

Finding the Fourth Proportional to 378,198,131.64, 521,921,407.64 and 213,185,657.40

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Solution

The fourth proportional to 378,198,131.64, 521,921,407.64 and 213,185,657.40 is: 294,200,708.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,198,131.64 : 521,921,407.64 = 213,185,657.40 : x
  2. Step 2: Convert to fraction form
    378,198,131.64/521,921,407.64 = 213,185,657.40/x
  3. Step 3: Cross multiply
    378,198,131.64x = 521,921,407.64 × 213,185,657.40
  4. Step 4: Simplify right side
    378,198,131.64x = 111,266,158,398,866,784
  5. Step 5: Solve for x
    x = 111,266,158,398,866,784/378,198,131.64
  6. Step 6: Final answer
    x = 294,200,708.81

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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.