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Finding the Fourth Proportional to 313.56, 432.63 and 203.10

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Solution

The fourth proportional to 313.56, 432.63 and 203.10 is: 280.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.56 : 432.63 = 203.10 : x
  2. Step 2: Convert to fraction form
    313.56/432.63 = 203.10/x
  3. Step 3: Cross multiply
    313.56x = 432.63 × 203.10
  4. Step 4: Simplify right side
    313.56x = 87,867.15
  5. Step 5: Solve for x
    x = 87,867.15/313.56
  6. Step 6: Final answer
    x = 280.22

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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.