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Finding the Fourth Proportional to 313.64, 432.40 and 269.28

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Solution

The fourth proportional to 313.64, 432.40 and 269.28 is: 371.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.64 : 432.40 = 269.28 : x
  2. Step 2: Convert to fraction form
    313.64/432.40 = 269.28/x
  3. Step 3: Cross multiply
    313.64x = 432.40 × 269.28
  4. Step 4: Simplify right side
    313.64x = 116,436.67
  5. Step 5: Solve for x
    x = 116,436.67/313.64
  6. Step 6: Final answer
    x = 371.24

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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.