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Finding the Fourth Proportional to 1,808.46, 2,712.78 and 654.12

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Solution

The fourth proportional to 1,808.46, 2,712.78 and 654.12 is: 981.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,808.46 : 2,712.78 = 654.12 : x
  2. Step 2: Convert to fraction form
    1,808.46/2,712.78 = 654.12/x
  3. Step 3: Cross multiply
    1,808.46x = 2,712.78 × 654.12
  4. Step 4: Simplify right side
    1,808.46x = 1,774,483.65
  5. Step 5: Solve for x
    x = 1,774,483.65/1,808.46
  6. Step 6: Final answer
    x = 981.21

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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.