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Finding the Fourth Proportional to 1,257.09, 1,885.63 and 824.14

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Solution

The fourth proportional to 1,257.09, 1,885.63 and 824.14 is: 1,236.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257.09 : 1,885.63 = 824.14 : x
  2. Step 2: Convert to fraction form
    1,257.09/1,885.63 = 824.14/x
  3. Step 3: Cross multiply
    1,257.09x = 1,885.63 × 824.14
  4. Step 4: Simplify right side
    1,257.09x = 1,554,023.11
  5. Step 5: Solve for x
    x = 1,554,023.11/1,257.09
  6. Step 6: Final answer
    x = 1,236.21

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1.5x scale

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.