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Finding the Fourth Proportional to 328,869.90, 493,113.42 and 128,955.96

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Solution

The fourth proportional to 328,869.90, 493,113.42 and 128,955.96 is: 193,358.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,869.90 : 493,113.42 = 128,955.96 : x
  2. Step 2: Convert to fraction form
    328,869.90/493,113.42 = 128,955.96/x
  3. Step 3: Cross multiply
    328,869.90x = 493,113.42 × 128,955.96
  4. Step 4: Simplify right side
    328,869.90x = 63,589,914,464.98
  5. Step 5: Solve for x
    x = 63,589,914,464.98/328,869.90
  6. Step 6: Final answer
    x = 193,358.88

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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.