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Finding the Fourth Proportional to 328,277.60, 492,070.80 and 128,520.80

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Solution

The fourth proportional to 328,277.60, 492,070.80 and 128,520.80 is: 192,645.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,277.60 : 492,070.80 = 128,520.80 : x
  2. Step 2: Convert to fraction form
    328,277.60/492,070.80 = 128,520.80/x
  3. Step 3: Cross multiply
    328,277.60x = 492,070.80 × 128,520.80
  4. Step 4: Simplify right side
    328,277.60x = 63,241,332,872.64
  5. Step 5: Solve for x
    x = 63,241,332,872.64/328,277.60
  6. Step 6: Final answer
    x = 192,645.90

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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.