Home / 1,257.20-1,886.10-526.37

Finding the Fourth Proportional to 1,257.20, 1,886.10 and 526.37

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Solution

The fourth proportional to 1,257.20, 1,886.10 and 526.37 is: 789.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257.20 : 1,886.10 = 526.37 : x
  2. Step 2: Convert to fraction form
    1,257.20/1,886.10 = 526.37/x
  3. Step 3: Cross multiply
    1,257.20x = 1,886.10 × 526.37
  4. Step 4: Simplify right side
    1,257.20x = 992,786.46
  5. Step 5: Solve for x
    x = 992,786.46/1,257.20
  6. Step 6: Final answer
    x = 789.68

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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.