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Finding the Fourth Proportional to 2,919.13, 4,379.10 and 971.13

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Solution

The fourth proportional to 2,919.13, 4,379.10 and 971.13 is: 1,456.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,919.13 : 4,379.10 = 971.13 : x
  2. Step 2: Convert to fraction form
    2,919.13/4,379.10 = 971.13/x
  3. Step 3: Cross multiply
    2,919.13x = 4,379.10 × 971.13
  4. Step 4: Simplify right side
    2,919.13x = 4,252,675.38
  5. Step 5: Solve for x
    x = 4,252,675.38/2,919.13
  6. Step 6: Final answer
    x = 1,456.83

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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.