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Finding the Fourth Proportional to 328,693.44, 492,817.67 and 128,889.12

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Solution

The fourth proportional to 328,693.44, 492,817.67 and 128,889.12 is: 193,246.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,693.44 : 492,817.67 = 128,889.12 : x
  2. Step 2: Convert to fraction form
    328,693.44/492,817.67 = 128,889.12/x
  3. Step 3: Cross multiply
    328,693.44x = 492,817.67 × 128,889.12
  4. Step 4: Simplify right side
    328,693.44x = 63,518,835,806.75
  5. Step 5: Solve for x
    x = 63,518,835,806.75/328,693.44
  6. Step 6: Final answer
    x = 193,246.44

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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.