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Finding the Fourth Proportional to 328,693.56, 492,817.86 and 128,889.24

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Solution

The fourth proportional to 328,693.56, 492,817.86 and 128,889.24 is: 193,246.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,693.56 : 492,817.86 = 128,889.24 : x
  2. Step 2: Convert to fraction form
    328,693.56/492,817.86 = 128,889.24/x
  3. Step 3: Cross multiply
    328,693.56x = 492,817.86 × 128,889.24
  4. Step 4: Simplify right side
    328,693.56x = 63,518,919,433.83
  5. Step 5: Solve for x
    x = 63,518,919,433.83/328,693.56
  6. Step 6: Final answer
    x = 193,246.62

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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.