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Finding the Fourth Proportional to 1,433.64, 2,150.80 and 611.96

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Solution

The fourth proportional to 1,433.64, 2,150.80 and 611.96 is: 918.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,433.64 : 2,150.80 = 611.96 : x
  2. Step 2: Convert to fraction form
    1,433.64/2,150.80 = 611.96/x
  3. Step 3: Cross multiply
    1,433.64x = 2,150.80 × 611.96
  4. Step 4: Simplify right side
    1,433.64x = 1,316,203.57
  5. Step 5: Solve for x
    x = 1,316,203.57/1,433.64
  6. Step 6: Final answer
    x = 918.09

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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.