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Finding the Fourth Proportional to 645.40, 967.38 and 500.76

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Solution

The fourth proportional to 645.40, 967.38 and 500.76 is: 750.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.40 : 967.38 = 500.76 : x
  2. Step 2: Convert to fraction form
    645.40/967.38 = 500.76/x
  3. Step 3: Cross multiply
    645.40x = 967.38 × 500.76
  4. Step 4: Simplify right side
    645.40x = 484,425.21
  5. Step 5: Solve for x
    x = 484,425.21/645.40
  6. Step 6: Final answer
    x = 750.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.