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Finding the Fourth Proportional to 1,256.82, 1,885.30 and 526.34

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Solution

The fourth proportional to 1,256.82, 1,885.30 and 526.34 is: 789.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,256.82 : 1,885.30 = 526.34 : x
  2. Step 2: Convert to fraction form
    1,256.82/1,885.30 = 526.34/x
  3. Step 3: Cross multiply
    1,256.82x = 1,885.30 × 526.34
  4. Step 4: Simplify right side
    1,256.82x = 992,308.80
  5. Step 5: Solve for x
    x = 992,308.80/1,256.82
  6. Step 6: Final answer
    x = 789.54

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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.