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Finding the Fourth Proportional to 555.89, 836.92 and 491.26

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Solution

The fourth proportional to 555.89, 836.92 and 491.26 is: 739.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.89 : 836.92 = 491.26 : x
  2. Step 2: Convert to fraction form
    555.89/836.92 = 491.26/x
  3. Step 3: Cross multiply
    555.89x = 836.92 × 491.26
  4. Step 4: Simplify right side
    555.89x = 411,145.32
  5. Step 5: Solve for x
    x = 411,145.32/555.89
  6. Step 6: Final answer
    x = 739.62

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.