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Finding the Fourth Proportional to 328,414.14, 492,423.21 and 128,495.82

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Solution

The fourth proportional to 328,414.14, 492,423.21 and 128,495.82 is: 192,666.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,414.14 : 492,423.21 = 128,495.82 : x
  2. Step 2: Convert to fraction form
    328,414.14/492,423.21 = 128,495.82/x
  3. Step 3: Cross multiply
    328,414.14x = 492,423.21 × 128,495.82
  4. Step 4: Simplify right side
    328,414.14x = 63,274,324,155.98
  5. Step 5: Solve for x
    x = 63,274,324,155.98/328,414.14
  6. Step 6: Final answer
    x = 192,666.26

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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.