Home / 668,128.38-1,002,039.21-398,332.86

Finding the Fourth Proportional to 668,128.38, 1,002,039.21 and 398,332.86

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Solution

The fourth proportional to 668,128.38, 1,002,039.21 and 398,332.86 is: 597,407.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,128.38 : 1,002,039.21 = 398,332.86 : x
  2. Step 2: Convert to fraction form
    668,128.38/1,002,039.21 = 398,332.86/x
  3. Step 3: Cross multiply
    668,128.38x = 1,002,039.21 × 398,332.86
  4. Step 4: Simplify right side
    668,128.38x = 399,145,144,351.44
  5. Step 5: Solve for x
    x = 399,145,144,351.44/668,128.38
  6. Step 6: Final answer
    x = 597,407.86

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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.