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Finding the Fourth Proportional to 555.57, 767 and 369.31

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Solution

The fourth proportional to 555.57, 767 and 369.31 is: 509.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.57 : 767 = 369.31 : x
  2. Step 2: Convert to fraction form
    555.57/767 = 369.31/x
  3. Step 3: Cross multiply
    555.57x = 767 × 369.31
  4. Step 4: Simplify right side
    555.57x = 283,260.77
  5. Step 5: Solve for x
    x = 283,260.77/555.57
  6. Step 6: Final answer
    x = 509.86

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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.