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Finding the Fourth Proportional to 1,808.36, 2,712.56 and 654.11

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Solution

The fourth proportional to 1,808.36, 2,712.56 and 654.11 is: 981.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,808.36 : 2,712.56 = 654.11 : x
  2. Step 2: Convert to fraction form
    1,808.36/2,712.56 = 654.11/x
  3. Step 3: Cross multiply
    1,808.36x = 2,712.56 × 654.11
  4. Step 4: Simplify right side
    1,808.36x = 1,774,305.96
  5. Step 5: Solve for x
    x = 1,774,305.96/1,808.36
  6. Step 6: Final answer
    x = 981.17

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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.