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Finding the Fourth Proportional to 313.90, 433.67 and 215.93

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Solution

The fourth proportional to 313.90, 433.67 and 215.93 is: 298.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.90 : 433.67 = 215.93 : x
  2. Step 2: Convert to fraction form
    313.90/433.67 = 215.93/x
  3. Step 3: Cross multiply
    313.90x = 433.67 × 215.93
  4. Step 4: Simplify right side
    313.90x = 93,642.37
  5. Step 5: Solve for x
    x = 93,642.37/313.90
  6. Step 6: Final answer
    x = 298.32

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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.