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Finding the Fourth Proportional to 328,605.12, 492,908.76 and 91,946.88

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Solution

The fourth proportional to 328,605.12, 492,908.76 and 91,946.88 is: 137,920.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,605.12 : 492,908.76 = 91,946.88 : x
  2. Step 2: Convert to fraction form
    328,605.12/492,908.76 = 91,946.88/x
  3. Step 3: Cross multiply
    328,605.12x = 492,908.76 × 91,946.88
  4. Step 4: Simplify right side
    328,605.12x = 45,321,422,606.67
  5. Step 5: Solve for x
    x = 45,321,422,606.67/328,605.12
  6. Step 6: Final answer
    x = 137,920.62

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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.