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Finding the Fourth Proportional to 538.88, 804.60 and 487.88

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Solution

The fourth proportional to 538.88, 804.60 and 487.88 is: 728.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.88 : 804.60 = 487.88 : x
  2. Step 2: Convert to fraction form
    538.88/804.60 = 487.88/x
  3. Step 3: Cross multiply
    538.88x = 804.60 × 487.88
  4. Step 4: Simplify right side
    538.88x = 392,548.25
  5. Step 5: Solve for x
    x = 392,548.25/538.88
  6. Step 6: Final answer
    x = 728.45

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.