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Finding the Fourth Proportional to 2,457.45, 3,685.21 and 813.55

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Solution

The fourth proportional to 2,457.45, 3,685.21 and 813.55 is: 1,220.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,457.45 : 3,685.21 = 813.55 : x
  2. Step 2: Convert to fraction form
    2,457.45/3,685.21 = 813.55/x
  3. Step 3: Cross multiply
    2,457.45x = 3,685.21 × 813.55
  4. Step 4: Simplify right side
    2,457.45x = 2,998,102.60
  5. Step 5: Solve for x
    x = 2,998,102.60/2,457.45
  6. Step 6: Final answer
    x = 1,220.01

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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.