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Finding the Fourth Proportional to 328,539.65, 492,813.39 and 128,954.03

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Solution

The fourth proportional to 328,539.65, 492,813.39 and 128,954.03 is: 193,432.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,539.65 : 492,813.39 = 128,954.03 : x
  2. Step 2: Convert to fraction form
    328,539.65/492,813.39 = 128,954.03/x
  3. Step 3: Cross multiply
    328,539.65x = 492,813.39 × 128,954.03
  4. Step 4: Simplify right side
    328,539.65x = 63,550,272,678.46
  5. Step 5: Solve for x
    x = 63,550,272,678.46/328,539.65
  6. Step 6: Final answer
    x = 193,432.58

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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.