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Finding the Fourth Proportional to 313.65, 432.69 and 203.16

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Solution

The fourth proportional to 313.65, 432.69 and 203.16 is: 280.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.65 : 432.69 = 203.16 : x
  2. Step 2: Convert to fraction form
    313.65/432.69 = 203.16/x
  3. Step 3: Cross multiply
    313.65x = 432.69 × 203.16
  4. Step 4: Simplify right side
    313.65x = 87,905.81
  5. Step 5: Solve for x
    x = 87,905.81/313.65
  6. Step 6: Final answer
    x = 280.26

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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.