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Finding the Fourth Proportional to 400,872.78, 601,378.29 and 134,658.90

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Solution

The fourth proportional to 400,872.78, 601,378.29 and 134,658.90 is: 202,011.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,872.78 : 601,378.29 = 134,658.90 : x
  2. Step 2: Convert to fraction form
    400,872.78/601,378.29 = 134,658.90/x
  3. Step 3: Cross multiply
    400,872.78x = 601,378.29 × 134,658.90
  4. Step 4: Simplify right side
    400,872.78x = 80,980,939,015.28
  5. Step 5: Solve for x
    x = 80,980,939,015.28/400,872.78
  6. Step 6: Final answer
    x = 202,011.57

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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.