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Finding the Fourth Proportional to 555.92, 767.19 and 319.91

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Solution

The fourth proportional to 555.92, 767.19 and 319.91 is: 441.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.92 : 767.19 = 319.91 : x
  2. Step 2: Convert to fraction form
    555.92/767.19 = 319.91/x
  3. Step 3: Cross multiply
    555.92x = 767.19 × 319.91
  4. Step 4: Simplify right side
    555.92x = 245,431.75
  5. Step 5: Solve for x
    x = 245,431.75/555.92
  6. Step 6: Final answer
    x = 441.49

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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.