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Finding the Fourth Proportional to 313.73, 432.96 and 215.51

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Solution

The fourth proportional to 313.73, 432.96 and 215.51 is: 297.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.73 : 432.96 = 215.51 : x
  2. Step 2: Convert to fraction form
    313.73/432.96 = 215.51/x
  3. Step 3: Cross multiply
    313.73x = 432.96 × 215.51
  4. Step 4: Simplify right side
    313.73x = 93,305.04
  5. Step 5: Solve for x
    x = 93,305.04/313.73
  6. Step 6: Final answer
    x = 297.41

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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.