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Finding the Fourth Proportional to 2,381.03, 3,572.15 and 919.79

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Solution

The fourth proportional to 2,381.03, 3,572.15 and 919.79 is: 1,379.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,381.03 : 3,572.15 = 919.79 : x
  2. Step 2: Convert to fraction form
    2,381.03/3,572.15 = 919.79/x
  3. Step 3: Cross multiply
    2,381.03x = 3,572.15 × 919.79
  4. Step 4: Simplify right side
    2,381.03x = 3,285,605.39
  5. Step 5: Solve for x
    x = 3,285,605.39/2,381.03
  6. Step 6: Final answer
    x = 1,379.91

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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.