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Finding the Fourth Proportional to 2,154.84, 3,230.64 and 1,114.40

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Solution

The fourth proportional to 2,154.84, 3,230.64 and 1,114.40 is: 1,670.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,154.84 : 3,230.64 = 1,114.40 : x
  2. Step 2: Convert to fraction form
    2,154.84/3,230.64 = 1,114.40/x
  3. Step 3: Cross multiply
    2,154.84x = 3,230.64 × 1,114.40
  4. Step 4: Simplify right side
    2,154.84x = 3,600,209.06
  5. Step 5: Solve for x
    x = 3,600,209.06/2,154.84
  6. Step 6: Final answer
    x = 1,670.75

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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.