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Finding the Fourth Proportional to 555.22, 831 and 494.47

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Solution

The fourth proportional to 555.22, 831 and 494.47 is: 740.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.22 : 831 = 494.47 : x
  2. Step 2: Convert to fraction form
    555.22/831 = 494.47/x
  3. Step 3: Cross multiply
    555.22x = 831 × 494.47
  4. Step 4: Simplify right side
    555.22x = 410,904.57
  5. Step 5: Solve for x
    x = 410,904.57/555.22
  6. Step 6: Final answer
    x = 740.08

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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.