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Finding the Fourth Proportional to 5,221.77, 7,830.22 and 1,934.79

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Solution

The fourth proportional to 5,221.77, 7,830.22 and 1,934.79 is: 2,901.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,221.77 : 7,830.22 = 1,934.79 : x
  2. Step 2: Convert to fraction form
    5,221.77/7,830.22 = 1,934.79/x
  3. Step 3: Cross multiply
    5,221.77x = 7,830.22 × 1,934.79
  4. Step 4: Simplify right side
    5,221.77x = 15,149,831.35
  5. Step 5: Solve for x
    x = 15,149,831.35/5,221.77
  6. Step 6: Final answer
    x = 2,901.28

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1.5x scale

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.