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Finding the Fourth Proportional to 328,659.78, 492,989.69 and 107,043.78

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Solution

The fourth proportional to 328,659.78, 492,989.69 and 107,043.78 is: 160,565.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,659.78 : 492,989.69 = 107,043.78 : x
  2. Step 2: Convert to fraction form
    328,659.78/492,989.69 = 107,043.78/x
  3. Step 3: Cross multiply
    328,659.78x = 492,989.69 × 107,043.78
  4. Step 4: Simplify right side
    328,659.78x = 52,771,479,918.63
  5. Step 5: Solve for x
    x = 52,771,479,918.63/328,659.78
  6. Step 6: Final answer
    x = 160,565.68

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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.