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Finding the Fourth Proportional to 328,605.75, 492,908.67 and 79,287.75

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Solution

The fourth proportional to 328,605.75, 492,908.67 and 79,287.75 is: 118,931.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,605.75 : 492,908.67 = 79,287.75 : x
  2. Step 2: Convert to fraction form
    328,605.75/492,908.67 = 79,287.75/x
  3. Step 3: Cross multiply
    328,605.75x = 492,908.67 × 79,287.75
  4. Step 4: Simplify right side
    328,605.75x = 39,081,619,399.79
  5. Step 5: Solve for x
    x = 39,081,619,399.79/328,605.75
  6. Step 6: Final answer
    x = 118,931.64

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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.