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Finding the Fourth Proportional to 619.81, 851.11 and 554.29

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Solution

The fourth proportional to 619.81, 851.11 and 554.29 is: 761.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.81 : 851.11 = 554.29 : x
  2. Step 2: Convert to fraction form
    619.81/851.11 = 554.29/x
  3. Step 3: Cross multiply
    619.81x = 851.11 × 554.29
  4. Step 4: Simplify right side
    619.81x = 471,763.15
  5. Step 5: Solve for x
    x = 471,763.15/619.81
  6. Step 6: Final answer
    x = 761.14

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.