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Finding the Fourth Proportional to 1,492.95, 2,239.65 and 518.94

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Solution

The fourth proportional to 1,492.95, 2,239.65 and 518.94 is: 778.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,492.95 : 2,239.65 = 518.94 : x
  2. Step 2: Convert to fraction form
    1,492.95/2,239.65 = 518.94/x
  3. Step 3: Cross multiply
    1,492.95x = 2,239.65 × 518.94
  4. Step 4: Simplify right side
    1,492.95x = 1,162,243.97
  5. Step 5: Solve for x
    x = 1,162,243.97/1,492.95
  6. Step 6: Final answer
    x = 778.49

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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.