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Finding the Fourth Proportional to 3,200.53, 4,800.40 and 860.71

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Solution

The fourth proportional to 3,200.53, 4,800.40 and 860.71 is: 1,290.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,200.53 : 4,800.40 = 860.71 : x
  2. Step 2: Convert to fraction form
    3,200.53/4,800.40 = 860.71/x
  3. Step 3: Cross multiply
    3,200.53x = 4,800.40 × 860.71
  4. Step 4: Simplify right side
    3,200.53x = 4,131,752.28
  5. Step 5: Solve for x
    x = 4,131,752.28/3,200.53
  6. Step 6: Final answer
    x = 1,290.96

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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.