Home / 398,406.31-597,726.04-128,529.26

Finding the Fourth Proportional to 398,406.31, 597,726.04 and 128,529.26

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Solution

The fourth proportional to 398,406.31, 597,726.04 and 128,529.26 is: 192,831.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,406.31 : 597,726.04 = 128,529.26 : x
  2. Step 2: Convert to fraction form
    398,406.31/597,726.04 = 128,529.26/x
  3. Step 3: Cross multiply
    398,406.31x = 597,726.04 × 128,529.26
  4. Step 4: Simplify right side
    398,406.31x = 76,825,282,615.30
  5. Step 5: Solve for x
    x = 76,825,282,615.30/398,406.31
  6. Step 6: Final answer
    x = 192,831.49

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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.