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Finding the Fourth Proportional to 328,035.20, 492,094.48 and 128,329.98

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Solution

The fourth proportional to 328,035.20, 492,094.48 and 128,329.98 is: 192,511.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,035.20 : 492,094.48 = 128,329.98 : x
  2. Step 2: Convert to fraction form
    328,035.20/492,094.48 = 128,329.98/x
  3. Step 3: Cross multiply
    328,035.20x = 492,094.48 × 128,329.98
  4. Step 4: Simplify right side
    328,035.20x = 63,150,474,776.51
  5. Step 5: Solve for x
    x = 63,150,474,776.51/328,035.20
  6. Step 6: Final answer
    x = 192,511.28

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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.