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Finding the Fourth Proportional to 555.56, 832.77 and 209.15

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Solution

The fourth proportional to 555.56, 832.77 and 209.15 is: 313.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.56 : 832.77 = 209.15 : x
  2. Step 2: Convert to fraction form
    555.56/832.77 = 209.15/x
  3. Step 3: Cross multiply
    555.56x = 832.77 × 209.15
  4. Step 4: Simplify right side
    555.56x = 174,175.93
  5. Step 5: Solve for x
    x = 174,175.93/555.56
  6. Step 6: Final answer
    x = 313.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.