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Finding the Fourth Proportional to 645.02, 960.73 and 631.52

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Solution

The fourth proportional to 645.02, 960.73 and 631.52 is: 940.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.02 : 960.73 = 631.52 : x
  2. Step 2: Convert to fraction form
    645.02/960.73 = 631.52/x
  3. Step 3: Cross multiply
    645.02x = 960.73 × 631.52
  4. Step 4: Simplify right side
    645.02x = 606,719.39
  5. Step 5: Solve for x
    x = 606,719.39/645.02
  6. Step 6: Final answer
    x = 940.62

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.