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Finding the Fourth Proportional to 696.98, 959.76 and 500.15

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Solution

The fourth proportional to 696.98, 959.76 and 500.15 is: 688.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.98 : 959.76 = 500.15 : x
  2. Step 2: Convert to fraction form
    696.98/959.76 = 500.15/x
  3. Step 3: Cross multiply
    696.98x = 959.76 × 500.15
  4. Step 4: Simplify right side
    696.98x = 480,019.17
  5. Step 5: Solve for x
    x = 480,019.17/696.98
  6. Step 6: Final answer
    x = 688.72

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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.