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Finding the Fourth Proportional to 498.96, 688.88 and 358.98

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Solution

The fourth proportional to 498.96, 688.88 and 358.98 is: 495.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.96 : 688.88 = 358.98 : x
  2. Step 2: Convert to fraction form
    498.96/688.88 = 358.98/x
  3. Step 3: Cross multiply
    498.96x = 688.88 × 358.98
  4. Step 4: Simplify right side
    498.96x = 247,292.35
  5. Step 5: Solve for x
    x = 247,292.35/498.96
  6. Step 6: Final answer
    x = 495.62

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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.