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Finding the Fourth Proportional to 275,963.50, 380,829.99 and 156,731.50

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Solution

The fourth proportional to 275,963.50, 380,829.99 and 156,731.50 is: 216,289.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,963.50 : 380,829.99 = 156,731.50 : x
  2. Step 2: Convert to fraction form
    275,963.50/380,829.99 = 156,731.50/x
  3. Step 3: Cross multiply
    275,963.50x = 380,829.99 × 156,731.50
  4. Step 4: Simplify right side
    275,963.50x = 59,688,055,577.69
  5. Step 5: Solve for x
    x = 59,688,055,577.69/275,963.50
  6. Step 6: Final answer
    x = 216,289.67

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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.