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Finding the Fourth Proportional to 261,999.50, 361,542.30 and 154,544.90

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Solution

The fourth proportional to 261,999.50, 361,542.30 and 154,544.90 is: 213,261.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,999.50 : 361,542.30 = 154,544.90 : x
  2. Step 2: Convert to fraction form
    261,999.50/361,542.30 = 154,544.90/x
  3. Step 3: Cross multiply
    261,999.50x = 361,542.30 × 154,544.90
  4. Step 4: Simplify right side
    261,999.50x = 55,874,518,599.27
  5. Step 5: Solve for x
    x = 55,874,518,599.27/261,999.50
  6. Step 6: Final answer
    x = 213,261.93

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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.