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Finding the Fourth Proportional to 421,770.80, 632,658.60 and 172,452.80

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Solution

The fourth proportional to 421,770.80, 632,658.60 and 172,452.80 is: 258,680.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,770.80 : 632,658.60 = 172,452.80 : x
  2. Step 2: Convert to fraction form
    421,770.80/632,658.60 = 172,452.80/x
  3. Step 3: Cross multiply
    421,770.80x = 632,658.60 × 172,452.80
  4. Step 4: Simplify right side
    421,770.80x = 109,103,747,014.08
  5. Step 5: Solve for x
    x = 109,103,747,014.08/421,770.80
  6. Step 6: Final answer
    x = 258,680.18

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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.