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Finding the Fourth Proportional to 190,408.80, 285,613.20 and 172,912.80

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Solution

The fourth proportional to 190,408.80, 285,613.20 and 172,912.80 is: 259,369.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,408.80 : 285,613.20 = 172,912.80 : x
  2. Step 2: Convert to fraction form
    190,408.80/285,613.20 = 172,912.80/x
  3. Step 3: Cross multiply
    190,408.80x = 285,613.20 × 172,912.80
  4. Step 4: Simplify right side
    190,408.80x = 49,386,178,128.96
  5. Step 5: Solve for x
    x = 49,386,178,128.96/190,408.80
  6. Step 6: Final answer
    x = 259,369.20

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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.