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Finding the Fourth Proportional to 328,608.30, 492,912.45 and 216,415.20

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Solution

The fourth proportional to 328,608.30, 492,912.45 and 216,415.20 is: 324,622.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,608.30 : 492,912.45 = 216,415.20 : x
  2. Step 2: Convert to fraction form
    328,608.30/492,912.45 = 216,415.20/x
  3. Step 3: Cross multiply
    328,608.30x = 492,912.45 × 216,415.20
  4. Step 4: Simplify right side
    328,608.30x = 106,673,746,449.24
  5. Step 5: Solve for x
    x = 106,673,746,449.24/328,608.30
  6. Step 6: Final answer
    x = 324,622.80

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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.