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Finding the Fourth Proportional to 561.39, 774.76 and 325.41

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Solution

The fourth proportional to 561.39, 774.76 and 325.41 is: 449.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.39 : 774.76 = 325.41 : x
  2. Step 2: Convert to fraction form
    561.39/774.76 = 325.41/x
  3. Step 3: Cross multiply
    561.39x = 774.76 × 325.41
  4. Step 4: Simplify right side
    561.39x = 252,114.65
  5. Step 5: Solve for x
    x = 252,114.65/561.39
  6. Step 6: Final answer
    x = 449.09

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Find fourth proportional to 280.70, 387.38 and 162.71
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.