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Finding the Fourth Proportional to 388,980.80, 517,676.24 and 388,980.80

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Solution

The fourth proportional to 388,980.80, 517,676.24 and 388,980.80 is: 517,676.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,980.80 : 517,676.24 = 388,980.80 : x
  2. Step 2: Convert to fraction form
    388,980.80/517,676.24 = 388,980.80/x
  3. Step 3: Cross multiply
    388,980.80x = 517,676.24 × 388,980.80
  4. Step 4: Simplify right side
    388,980.80x = 201,366,117,976.19
  5. Step 5: Solve for x
    x = 201,366,117,976.19/388,980.80
  6. Step 6: Final answer
    x = 517,676.24

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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.