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Finding the Fourth Proportional to 438,817.20, 658,225.80 and 172,440.60

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Solution

The fourth proportional to 438,817.20, 658,225.80 and 172,440.60 is: 258,660.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,817.20 : 658,225.80 = 172,440.60 : x
  2. Step 2: Convert to fraction form
    438,817.20/658,225.80 = 172,440.60/x
  3. Step 3: Cross multiply
    438,817.20x = 658,225.80 × 172,440.60
  4. Step 4: Simplify right side
    438,817.20x = 113,504,851,887.48
  5. Step 5: Solve for x
    x = 113,504,851,887.48/438,817.20
  6. Step 6: Final answer
    x = 258,660.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.