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Finding the Fourth Proportional to 630.76, 945.55 and 338.46

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Solution

The fourth proportional to 630.76, 945.55 and 338.46 is: 507.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.76 : 945.55 = 338.46 : x
  2. Step 2: Convert to fraction form
    630.76/945.55 = 338.46/x
  3. Step 3: Cross multiply
    630.76x = 945.55 × 338.46
  4. Step 4: Simplify right side
    630.76x = 320,029.67
  5. Step 5: Solve for x
    x = 320,029.67/630.76
  6. Step 6: Final answer
    x = 507.38

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.