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Finding the Fourth Proportional to 3,539.70, 5,309.55 and 2,913.30

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Solution

The fourth proportional to 3,539.70, 5,309.55 and 2,913.30 is: 4,369.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,539.70 : 5,309.55 = 2,913.30 : x
  2. Step 2: Convert to fraction form
    3,539.70/5,309.55 = 2,913.30/x
  3. Step 3: Cross multiply
    3,539.70x = 5,309.55 × 2,913.30
  4. Step 4: Simplify right side
    3,539.70x = 15,468,312.02
  5. Step 5: Solve for x
    x = 15,468,312.02/3,539.70
  6. Step 6: Final answer
    x = 4,369.95

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Similar ratio
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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.