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Finding the Fourth Proportional to 550, 758.99 and 313.96

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Solution

The fourth proportional to 550, 758.99 and 313.96 is: 433.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    550 : 758.99 = 313.96 : x
  2. Step 2: Convert to fraction form
    550/758.99 = 313.96/x
  3. Step 3: Cross multiply
    550x = 758.99 × 313.96
  4. Step 4: Simplify right side
    550x = 238,292.50
  5. Step 5: Solve for x
    x = 238,292.50/550
  6. Step 6: Final answer
    x = 433.26

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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.