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Finding the Fourth Proportional to 557.22, 836.67 and 480.78

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Solution

The fourth proportional to 557.22, 836.67 and 480.78 is: 721.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.22 : 836.67 = 480.78 : x
  2. Step 2: Convert to fraction form
    557.22/836.67 = 480.78/x
  3. Step 3: Cross multiply
    557.22x = 836.67 × 480.78
  4. Step 4: Simplify right side
    557.22x = 402,254.20
  5. Step 5: Solve for x
    x = 402,254.20/557.22
  6. Step 6: Final answer
    x = 721.89

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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.