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Finding the Fourth Proportional to 681,320.74, 940,223.51 and 371,221.86

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Solution

The fourth proportional to 681,320.74, 940,223.51 and 371,221.86 is: 512,286.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,320.74 : 940,223.51 = 371,221.86 : x
  2. Step 2: Convert to fraction form
    681,320.74/940,223.51 = 371,221.86/x
  3. Step 3: Cross multiply
    681,320.74x = 940,223.51 × 371,221.86
  4. Step 4: Simplify right side
    681,320.74x = 349,031,520,197.93
  5. Step 5: Solve for x
    x = 349,031,520,197.93/681,320.74
  6. Step 6: Final answer
    x = 512,286.65

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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.