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Finding the Fourth Proportional to 388,329.09, 535,893.03 and 218,563.20

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Solution

The fourth proportional to 388,329.09, 535,893.03 and 218,563.20 is: 301,616.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,329.09 : 535,893.03 = 218,563.20 : x
  2. Step 2: Convert to fraction form
    388,329.09/535,893.03 = 218,563.20/x
  3. Step 3: Cross multiply
    388,329.09x = 535,893.03 × 218,563.20
  4. Step 4: Simplify right side
    388,329.09x = 117,126,495,494.50
  5. Step 5: Solve for x
    x = 117,126,495,494.50/388,329.09
  6. Step 6: Final answer
    x = 301,616.59

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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.