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Finding the Fourth Proportional to 228,289.98, 315,034.11 and 126,312.78

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Solution

The fourth proportional to 228,289.98, 315,034.11 and 126,312.78 is: 174,308.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,289.98 : 315,034.11 = 126,312.78 : x
  2. Step 2: Convert to fraction form
    228,289.98/315,034.11 = 126,312.78/x
  3. Step 3: Cross multiply
    228,289.98x = 315,034.11 × 126,312.78
  4. Step 4: Simplify right side
    228,289.98x = 39,792,834,228.93
  5. Step 5: Solve for x
    x = 39,792,834,228.93/228,289.98
  6. Step 6: Final answer
    x = 174,308.28

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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.