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Finding the Fourth Proportional to 690,346.80, 952,676.64 and 388,540.80

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Solution

The fourth proportional to 690,346.80, 952,676.64 and 388,540.80 is: 536,185.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,346.80 : 952,676.64 = 388,540.80 : x
  2. Step 2: Convert to fraction form
    690,346.80/952,676.64 = 388,540.80/x
  3. Step 3: Cross multiply
    690,346.80x = 952,676.64 × 388,540.80
  4. Step 4: Simplify right side
    690,346.80x = 370,153,743,846.91
  5. Step 5: Solve for x
    x = 370,153,743,846.91/690,346.80
  6. Step 6: Final answer
    x = 536,185.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.