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Finding the Fourth Proportional to 328,274.10, 492,065.55 and 128,517.30

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Solution

The fourth proportional to 328,274.10, 492,065.55 and 128,517.30 is: 192,640.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,274.10 : 492,065.55 = 128,517.30 : x
  2. Step 2: Convert to fraction form
    328,274.10/492,065.55 = 128,517.30/x
  3. Step 3: Cross multiply
    328,274.10x = 492,065.55 × 128,517.30
  4. Step 4: Simplify right side
    328,274.10x = 63,238,935,909.02
  5. Step 5: Solve for x
    x = 63,238,935,909.02/328,274.10
  6. Step 6: Final answer
    x = 192,640.65

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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.