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Finding the Fourth Proportional to 550.07, 759.08 and 317.20

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Solution

The fourth proportional to 550.07, 759.08 and 317.20 is: 437.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.07 : 759.08 = 317.20 : x
  2. Step 2: Convert to fraction form
    550.07/759.08 = 317.20/x
  3. Step 3: Cross multiply
    550.07x = 759.08 × 317.20
  4. Step 4: Simplify right side
    550.07x = 240,774.79
  5. Step 5: Solve for x
    x = 240,774.79/550.07
  6. Step 6: Final answer
    x = 437.72

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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.