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Finding the Fourth Proportional to 228,728.28, 315,645.12 and 139,304.28

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Solution

The fourth proportional to 228,728.28, 315,645.12 and 139,304.28 is: 192,239.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,728.28 : 315,645.12 = 139,304.28 : x
  2. Step 2: Convert to fraction form
    228,728.28/315,645.12 = 139,304.28/x
  3. Step 3: Cross multiply
    228,728.28x = 315,645.12 × 139,304.28
  4. Step 4: Simplify right side
    228,728.28x = 43,970,716,177.11
  5. Step 5: Solve for x
    x = 43,970,716,177.11/228,728.28
  6. Step 6: Final answer
    x = 192,239.96

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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.