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Finding the Fourth Proportional to 328,169.40, 492,254.10 and 78,851.40

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Solution

The fourth proportional to 328,169.40, 492,254.10 and 78,851.40 is: 118,277.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,169.40 : 492,254.10 = 78,851.40 : x
  2. Step 2: Convert to fraction form
    328,169.40/492,254.10 = 78,851.40/x
  3. Step 3: Cross multiply
    328,169.40x = 492,254.10 × 78,851.40
  4. Step 4: Simplify right side
    328,169.40x = 38,814,924,940.74
  5. Step 5: Solve for x
    x = 38,814,924,940.74/328,169.40
  6. Step 6: Final answer
    x = 118,277.10

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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.