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Finding the Fourth Proportional to 1,650.54, 2,475.89 and 919.57

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Solution

The fourth proportional to 1,650.54, 2,475.89 and 919.57 is: 1,379.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,650.54 : 2,475.89 = 919.57 : x
  2. Step 2: Convert to fraction form
    1,650.54/2,475.89 = 919.57/x
  3. Step 3: Cross multiply
    1,650.54x = 2,475.89 × 919.57
  4. Step 4: Simplify right side
    1,650.54x = 2,276,754.17
  5. Step 5: Solve for x
    x = 2,276,754.17/1,650.54
  6. Step 6: Final answer
    x = 1,379.40

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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.