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Finding the Fourth Proportional to 497.11, 686.69 and 388.02

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Solution

The fourth proportional to 497.11, 686.69 and 388.02 is: 536.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.11 : 686.69 = 388.02 : x
  2. Step 2: Convert to fraction form
    497.11/686.69 = 388.02/x
  3. Step 3: Cross multiply
    497.11x = 686.69 × 388.02
  4. Step 4: Simplify right side
    497.11x = 266,449.45
  5. Step 5: Solve for x
    x = 266,449.45/497.11
  6. Step 6: Final answer
    x = 536.00

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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.