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Finding the Fourth Proportional to 1,412.96, 2,120.07 and 547.34

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Solution

The fourth proportional to 1,412.96, 2,120.07 and 547.34 is: 821.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.96 : 2,120.07 = 547.34 : x
  2. Step 2: Convert to fraction form
    1,412.96/2,120.07 = 547.34/x
  3. Step 3: Cross multiply
    1,412.96x = 2,120.07 × 547.34
  4. Step 4: Simplify right side
    1,412.96x = 1,160,399.11
  5. Step 5: Solve for x
    x = 1,160,399.11/1,412.96
  6. Step 6: Final answer
    x = 821.25

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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.