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Finding the Fourth Proportional to 963.48, 1,328.70 and 626.82

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Solution

The fourth proportional to 963.48, 1,328.70 and 626.82 is: 864.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.48 : 1,328.70 = 626.82 : x
  2. Step 2: Convert to fraction form
    963.48/1,328.70 = 626.82/x
  3. Step 3: Cross multiply
    963.48x = 1,328.70 × 626.82
  4. Step 4: Simplify right side
    963.48x = 832,855.73
  5. Step 5: Solve for x
    x = 832,855.73/963.48
  6. Step 6: Final answer
    x = 864.42

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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.