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Finding the Fourth Proportional to 328,348.74, 492,744.54 and 128,644.08

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Solution

The fourth proportional to 328,348.74, 492,744.54 and 128,644.08 is: 193,052.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,348.74 : 492,744.54 = 128,644.08 : x
  2. Step 2: Convert to fraction form
    328,348.74/492,744.54 = 128,644.08/x
  3. Step 3: Cross multiply
    328,348.74x = 492,744.54 × 128,644.08
  4. Step 4: Simplify right side
    328,348.74x = 63,388,668,023.32
  5. Step 5: Solve for x
    x = 63,388,668,023.32/328,348.74
  6. Step 6: Final answer
    x = 193,052.87

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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.