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Finding the Fourth Proportional to 497.51, 686.55 and 276.45

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Solution

The fourth proportional to 497.51, 686.55 and 276.45 is: 381.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.51 : 686.55 = 276.45 : x
  2. Step 2: Convert to fraction form
    497.51/686.55 = 276.45/x
  3. Step 3: Cross multiply
    497.51x = 686.55 × 276.45
  4. Step 4: Simplify right side
    497.51x = 189,796.75
  5. Step 5: Solve for x
    x = 189,796.75/497.51
  6. Step 6: Final answer
    x = 381.49

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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.