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Finding the Fourth Proportional to 498.40, 688 and 336.74

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Solution

The fourth proportional to 498.40, 688 and 336.74 is: 464.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.40 : 688 = 336.74 : x
  2. Step 2: Convert to fraction form
    498.40/688 = 336.74/x
  3. Step 3: Cross multiply
    498.40x = 688 × 336.74
  4. Step 4: Simplify right side
    498.40x = 231,677.12
  5. Step 5: Solve for x
    x = 231,677.12/498.40
  6. Step 6: Final answer
    x = 464.84

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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.