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Finding the Fourth Proportional to 498.64, 688.08 and 382.72

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Solution

The fourth proportional to 498.64, 688.08 and 382.72 is: 528.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.64 : 688.08 = 382.72 : x
  2. Step 2: Convert to fraction form
    498.64/688.08 = 382.72/x
  3. Step 3: Cross multiply
    498.64x = 688.08 × 382.72
  4. Step 4: Simplify right side
    498.64x = 263,341.98
  5. Step 5: Solve for x
    x = 263,341.98/498.64
  6. Step 6: Final answer
    x = 528.12

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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.