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Finding the Fourth Proportional to 328,692.44, 492,816.17 and 128,888.12

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Solution

The fourth proportional to 328,692.44, 492,816.17 and 128,888.12 is: 193,244.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,692.44 : 492,816.17 = 128,888.12 : x
  2. Step 2: Convert to fraction form
    328,692.44/492,816.17 = 128,888.12/x
  3. Step 3: Cross multiply
    328,692.44x = 492,816.17 × 128,888.12
  4. Step 4: Simplify right side
    328,692.44x = 63,518,147,515.04
  5. Step 5: Solve for x
    x = 63,518,147,515.04/328,692.44
  6. Step 6: Final answer
    x = 193,244.93

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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.