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Finding the Fourth Proportional to 328,671.20, 493,005.20 and 128,850.40

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Solution

The fourth proportional to 328,671.20, 493,005.20 and 128,850.40 is: 193,274.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,671.20 : 493,005.20 = 128,850.40 : x
  2. Step 2: Convert to fraction form
    328,671.20/493,005.20 = 128,850.40/x
  3. Step 3: Cross multiply
    328,671.20x = 493,005.20 × 128,850.40
  4. Step 4: Simplify right side
    328,671.20x = 63,523,917,222.08
  5. Step 5: Solve for x
    x = 63,523,917,222.08/328,671.20
  6. Step 6: Final answer
    x = 193,274.97

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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.