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Finding the Fourth Proportional to 561.02, 845.16 and 439.82

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Solution

The fourth proportional to 561.02, 845.16 and 439.82 is: 662.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.02 : 845.16 = 439.82 : x
  2. Step 2: Convert to fraction form
    561.02/845.16 = 439.82/x
  3. Step 3: Cross multiply
    561.02x = 845.16 × 439.82
  4. Step 4: Simplify right side
    561.02x = 371,714.05
  5. Step 5: Solve for x
    x = 371,714.05/561.02
  6. Step 6: Final answer
    x = 662.57

Related Problems

Find fourth proportional to 280.51, 422.58 and 219.91
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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 (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.