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Finding the Fourth Proportional to 1,347.21, 2,020.81 and 373.31

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Solution

The fourth proportional to 1,347.21, 2,020.81 and 373.31 is: 559.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,347.21 : 2,020.81 = 373.31 : x
  2. Step 2: Convert to fraction form
    1,347.21/2,020.81 = 373.31/x
  3. Step 3: Cross multiply
    1,347.21x = 2,020.81 × 373.31
  4. Step 4: Simplify right side
    1,347.21x = 754,388.58
  5. Step 5: Solve for x
    x = 754,388.58/1,347.21
  6. Step 6: Final answer
    x = 559.96

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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.