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Finding the Fourth Proportional to 957.29, 1,320.84 and 626.54

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Solution

The fourth proportional to 957.29, 1,320.84 and 626.54 is: 864.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.29 : 1,320.84 = 626.54 : x
  2. Step 2: Convert to fraction form
    957.29/1,320.84 = 626.54/x
  3. Step 3: Cross multiply
    957.29x = 1,320.84 × 626.54
  4. Step 4: Simplify right side
    957.29x = 827,552.49
  5. Step 5: Solve for x
    x = 827,552.49/957.29
  6. Step 6: Final answer
    x = 864.48

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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.