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Finding the Fourth Proportional to 497.89, 687.04 and 288.03

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Solution

The fourth proportional to 497.89, 687.04 and 288.03 is: 397.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.89 : 687.04 = 288.03 : x
  2. Step 2: Convert to fraction form
    497.89/687.04 = 288.03/x
  3. Step 3: Cross multiply
    497.89x = 687.04 × 288.03
  4. Step 4: Simplify right side
    497.89x = 197,885.91
  5. Step 5: Solve for x
    x = 197,885.91/497.89
  6. Step 6: Final answer
    x = 397.45

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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.