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Finding the Fourth Proportional to 261,911.50, 361,420.86 and 154,456.90

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Solution

The fourth proportional to 261,911.50, 361,420.86 and 154,456.90 is: 213,140.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,911.50 : 361,420.86 = 154,456.90 : x
  2. Step 2: Convert to fraction form
    261,911.50/361,420.86 = 154,456.90/x
  3. Step 3: Cross multiply
    261,911.50x = 361,420.86 × 154,456.90
  4. Step 4: Simplify right side
    261,911.50x = 55,823,945,630.93
  5. Step 5: Solve for x
    x = 55,823,945,630.93/261,911.50
  6. Step 6: Final answer
    x = 213,140.49

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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.