Home / 1,492.30-2,056.80-1,211.50

Finding the Fourth Proportional to 1,492.30, 2,056.80 and 1,211.50

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Solution

The fourth proportional to 1,492.30, 2,056.80 and 1,211.50 is: 1,669.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,492.30 : 2,056.80 = 1,211.50 : x
  2. Step 2: Convert to fraction form
    1,492.30/2,056.80 = 1,211.50/x
  3. Step 3: Cross multiply
    1,492.30x = 2,056.80 × 1,211.50
  4. Step 4: Simplify right side
    1,492.30x = 2,491,813.20
  5. Step 5: Solve for x
    x = 2,491,813.20/1,492.30
  6. Step 6: Final answer
    x = 1,669.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.