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Finding the Fourth Proportional to 645.02, 966.42 and 425.51

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Solution

The fourth proportional to 645.02, 966.42 and 425.51 is: 637.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.02 : 966.42 = 425.51 : x
  2. Step 2: Convert to fraction form
    645.02/966.42 = 425.51/x
  3. Step 3: Cross multiply
    645.02x = 966.42 × 425.51
  4. Step 4: Simplify right side
    645.02x = 411,216.54
  5. Step 5: Solve for x
    x = 411,216.54/645.02
  6. Step 6: Final answer
    x = 637.53

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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.