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Finding the Fourth Proportional to 228,725.28, 315,640.98 and 139,301.28

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Solution

The fourth proportional to 228,725.28, 315,640.98 and 139,301.28 is: 192,235.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,725.28 : 315,640.98 = 139,301.28 : x
  2. Step 2: Convert to fraction form
    228,725.28/315,640.98 = 139,301.28/x
  3. Step 3: Cross multiply
    228,725.28x = 315,640.98 × 139,301.28
  4. Step 4: Simplify right side
    228,725.28x = 43,969,192,534.45
  5. Step 5: Solve for x
    x = 43,969,192,534.45/228,725.28
  6. Step 6: Final answer
    x = 192,235.82

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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.