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Finding the Fourth Proportional to 561.46, 774.18 and 443.44

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Solution

The fourth proportional to 561.46, 774.18 and 443.44 is: 611.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.46 : 774.18 = 443.44 : x
  2. Step 2: Convert to fraction form
    561.46/774.18 = 443.44/x
  3. Step 3: Cross multiply
    561.46x = 774.18 × 443.44
  4. Step 4: Simplify right side
    561.46x = 343,302.38
  5. Step 5: Solve for x
    x = 343,302.38/561.46
  6. Step 6: Final answer
    x = 611.45

Related Problems

Find fourth proportional to 280.73, 387.09 and 221.72
Half scale
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Double scale
Find fourth proportional to 562.46, 775.56 and 444.44
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.