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Finding the Fourth Proportional to 498.73, 687.50 and 388.01

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Solution

The fourth proportional to 498.73, 687.50 and 388.01 is: 534.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.73 : 687.50 = 388.01 : x
  2. Step 2: Convert to fraction form
    498.73/687.50 = 388.01/x
  3. Step 3: Cross multiply
    498.73x = 687.50 × 388.01
  4. Step 4: Simplify right side
    498.73x = 266,756.88
  5. Step 5: Solve for x
    x = 266,756.88/498.73
  6. Step 6: Final answer
    x = 534.87

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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.