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Finding the Fourth Proportional to 388,554.46, 535,999.92 and 267,485.56

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Solution

The fourth proportional to 388,554.46, 535,999.92 and 267,485.56 is: 368,988.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,554.46 : 535,999.92 = 267,485.56 : x
  2. Step 2: Convert to fraction form
    388,554.46/535,999.92 = 267,485.56/x
  3. Step 3: Cross multiply
    388,554.46x = 535,999.92 × 267,485.56
  4. Step 4: Simplify right side
    388,554.46x = 143,372,236,418.09
  5. Step 5: Solve for x
    x = 143,372,236,418.09/388,554.46
  6. Step 6: Final answer
    x = 368,988.78

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1.5x scale

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.