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Finding the Fourth Proportional to 328,460.36, 492,690.96 and 79,142.36

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Solution

The fourth proportional to 328,460.36, 492,690.96 and 79,142.36 is: 118,713.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,460.36 : 492,690.96 = 79,142.36 : x
  2. Step 2: Convert to fraction form
    328,460.36/492,690.96 = 79,142.36/x
  3. Step 3: Cross multiply
    328,460.36x = 492,690.96 × 79,142.36
  4. Step 4: Simplify right side
    328,460.36x = 38,992,725,325.07
  5. Step 5: Solve for x
    x = 38,992,725,325.07/328,460.36
  6. Step 6: Final answer
    x = 118,713.64

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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.