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Finding the Fourth Proportional to 3,570.39, 5,355.90 and 1,230.30

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Solution

The fourth proportional to 3,570.39, 5,355.90 and 1,230.30 is: 1,845.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,570.39 : 5,355.90 = 1,230.30 : x
  2. Step 2: Convert to fraction form
    3,570.39/5,355.90 = 1,230.30/x
  3. Step 3: Cross multiply
    3,570.39x = 5,355.90 × 1,230.30
  4. Step 4: Simplify right side
    3,570.39x = 6,589,363.77
  5. Step 5: Solve for x
    x = 6,589,363.77/3,570.39
  6. Step 6: Final answer
    x = 1,845.56

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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.