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Finding the Fourth Proportional to 1,492.12, 2,238.12 and 517.96

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Solution

The fourth proportional to 1,492.12, 2,238.12 and 517.96 is: 776.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,492.12 : 2,238.12 = 517.96 : x
  2. Step 2: Convert to fraction form
    1,492.12/2,238.12 = 517.96/x
  3. Step 3: Cross multiply
    1,492.12x = 2,238.12 × 517.96
  4. Step 4: Simplify right side
    1,492.12x = 1,159,256.64
  5. Step 5: Solve for x
    x = 1,159,256.64/1,492.12
  6. Step 6: Final answer
    x = 776.92

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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.