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Finding the Fourth Proportional to 498.09, 687.06 and 400.08

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Solution

The fourth proportional to 498.09, 687.06 and 400.08 is: 551.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.09 : 687.06 = 400.08 : x
  2. Step 2: Convert to fraction form
    498.09/687.06 = 400.08/x
  3. Step 3: Cross multiply
    498.09x = 687.06 × 400.08
  4. Step 4: Simplify right side
    498.09x = 274,878.96
  5. Step 5: Solve for x
    x = 274,878.96/498.09
  6. Step 6: Final answer
    x = 551.87

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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.