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Finding the Fourth Proportional to 328,114.48, 492,212.76 and 128,409.07

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Solution

The fourth proportional to 328,114.48, 492,212.76 and 128,409.07 is: 192,629.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,114.48 : 492,212.76 = 128,409.07 : x
  2. Step 2: Convert to fraction form
    328,114.48/492,212.76 = 128,409.07/x
  3. Step 3: Cross multiply
    328,114.48x = 492,212.76 × 128,409.07
  4. Step 4: Simplify right side
    328,114.48x = 63,204,582,753.73
  5. Step 5: Solve for x
    x = 63,204,582,753.73/328,114.48
  6. Step 6: Final answer
    x = 192,629.67

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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.