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Finding the Fourth Proportional to 561.67, 775.11 and 325.63

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Solution

The fourth proportional to 561.67, 775.11 and 325.63 is: 449.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.67 : 775.11 = 325.63 : x
  2. Step 2: Convert to fraction form
    561.67/775.11 = 325.63/x
  3. Step 3: Cross multiply
    561.67x = 775.11 × 325.63
  4. Step 4: Simplify right side
    561.67x = 252,398.26
  5. Step 5: Solve for x
    x = 252,398.26/561.67
  6. Step 6: Final answer
    x = 449.38

Related Problems

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Half scale
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Double scale
Find fourth proportional to 562.67, 776.49 and 326.63
Similar ratio
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1.5x scale

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.