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Finding the Fourth Proportional to 628.97, 943.40 and 424.85

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Solution

The fourth proportional to 628.97, 943.40 and 424.85 is: 637.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.97 : 943.40 = 424.85 : x
  2. Step 2: Convert to fraction form
    628.97/943.40 = 424.85/x
  3. Step 3: Cross multiply
    628.97x = 943.40 × 424.85
  4. Step 4: Simplify right side
    628.97x = 400,797.45
  5. Step 5: Solve for x
    x = 400,797.45/628.97
  6. Step 6: Final answer
    x = 637.23

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Double scale
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1.5x scale

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.