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Finding the Fourth Proportional to 6,412.70, 9,619.05 and 3,638.30

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Solution

The fourth proportional to 6,412.70, 9,619.05 and 3,638.30 is: 5,457.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,412.70 : 9,619.05 = 3,638.30 : x
  2. Step 2: Convert to fraction form
    6,412.70/9,619.05 = 3,638.30/x
  3. Step 3: Cross multiply
    6,412.70x = 9,619.05 × 3,638.30
  4. Step 4: Simplify right side
    6,412.70x = 34,996,989.62
  5. Step 5: Solve for x
    x = 34,996,989.62/6,412.70
  6. Step 6: Final answer
    x = 5,457.45

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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.