Home / 1,257.20-1,885.37-526.40

Finding the Fourth Proportional to 1,257.20, 1,885.37 and 526.40

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Solution

The fourth proportional to 1,257.20, 1,885.37 and 526.40 is: 789.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257.20 : 1,885.37 = 526.40 : x
  2. Step 2: Convert to fraction form
    1,257.20/1,885.37 = 526.40/x
  3. Step 3: Cross multiply
    1,257.20x = 1,885.37 × 526.40
  4. Step 4: Simplify right side
    1,257.20x = 992,446.71
  5. Step 5: Solve for x
    x = 992,446.71/1,257.20
  6. Step 6: Final answer
    x = 789.41

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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.