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Finding the Fourth Proportional to 388,492.80, 517,027.20 and 388,492.80

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Solution

The fourth proportional to 388,492.80, 517,027.20 and 388,492.80 is: 517,027.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,492.80 : 517,027.20 = 388,492.80 : x
  2. Step 2: Convert to fraction form
    388,492.80/517,027.20 = 388,492.80/x
  3. Step 3: Cross multiply
    388,492.80x = 517,027.20 × 388,492.80
  4. Step 4: Simplify right side
    388,492.80x = 200,861,344,604.16
  5. Step 5: Solve for x
    x = 200,861,344,604.16/388,492.80
  6. Step 6: Final answer
    x = 517,027.20

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.