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Finding the Fourth Proportional to 695.20, 959.70 and 498.82

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Solution

The fourth proportional to 695.20, 959.70 and 498.82 is: 688.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.20 : 959.70 = 498.82 : x
  2. Step 2: Convert to fraction form
    695.20/959.70 = 498.82/x
  3. Step 3: Cross multiply
    695.20x = 959.70 × 498.82
  4. Step 4: Simplify right side
    695.20x = 478,717.55
  5. Step 5: Solve for x
    x = 478,717.55/695.20
  6. Step 6: Final answer
    x = 688.60

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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.