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Finding the Fourth Proportional to 555.79, 832.74 and 393.22

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Solution

The fourth proportional to 555.79, 832.74 and 393.22 is: 589.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.79 : 832.74 = 393.22 : x
  2. Step 2: Convert to fraction form
    555.79/832.74 = 393.22/x
  3. Step 3: Cross multiply
    555.79x = 832.74 × 393.22
  4. Step 4: Simplify right side
    555.79x = 327,450.02
  5. Step 5: Solve for x
    x = 327,450.02/555.79
  6. Step 6: Final answer
    x = 589.16

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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.