Home / 1,257.20-1,885.04-526.40

Finding the Fourth Proportional to 1,257.20, 1,885.04 and 526.40

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Solution

The fourth proportional to 1,257.20, 1,885.04 and 526.40 is: 789.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257.20 : 1,885.04 = 526.40 : x
  2. Step 2: Convert to fraction form
    1,257.20/1,885.04 = 526.40/x
  3. Step 3: Cross multiply
    1,257.20x = 1,885.04 × 526.40
  4. Step 4: Simplify right side
    1,257.20x = 992,285.06
  5. Step 5: Solve for x
    x = 992,285.06/1,257.20
  6. Step 6: Final answer
    x = 789.28

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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.