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Finding the Fourth Proportional to 407.53, 563.06 and 320.86

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Solution

The fourth proportional to 407.53, 563.06 and 320.86 is: 443.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.53 : 563.06 = 320.86 : x
  2. Step 2: Convert to fraction form
    407.53/563.06 = 320.86/x
  3. Step 3: Cross multiply
    407.53x = 563.06 × 320.86
  4. Step 4: Simplify right side
    407.53x = 180,659.01
  5. Step 5: Solve for x
    x = 180,659.01/407.53
  6. Step 6: Final answer
    x = 443.31

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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.