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Finding the Fourth Proportional to 1,233.10, 1,845.60 and 957.70

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Solution

The fourth proportional to 1,233.10, 1,845.60 and 957.70 is: 1,433.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,233.10 : 1,845.60 = 957.70 : x
  2. Step 2: Convert to fraction form
    1,233.10/1,845.60 = 957.70/x
  3. Step 3: Cross multiply
    1,233.10x = 1,845.60 × 957.70
  4. Step 4: Simplify right side
    1,233.10x = 1,767,531.12
  5. Step 5: Solve for x
    x = 1,767,531.12/1,233.10
  6. Step 6: Final answer
    x = 1,433.40

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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.