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Finding the Fourth Proportional to 3,459.50, 5,189.57 and 1,379

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Solution

The fourth proportional to 3,459.50, 5,189.57 and 1,379 is: 2,068.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,459.50 : 5,189.57 = 1,379 : x
  2. Step 2: Convert to fraction form
    3,459.50/5,189.57 = 1,379/x
  3. Step 3: Cross multiply
    3,459.50x = 5,189.57 × 1,379
  4. Step 4: Simplify right side
    3,459.50x = 7,156,417.03
  5. Step 5: Solve for x
    x = 7,156,417.03/3,459.50
  6. Step 6: Final answer
    x = 2,068.63

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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.